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Workers at thousands of jobsites in Pennsylvania—including shipyardsoil refinerieschemical refineries and railyards—may have been exposed to asbestos on the job. Exposure to asbestos may increase the risk of a number of serious and potentially deadly diseases, including mesothelioma cancer, lung cancer and asbestosis.

If you or a loved one worked at an asbestos jobsite in the state of Pennsylvania and were diagnosed with mesothelioma or another asbestos-related disease, you may be eligible to file a lawsuit. For a free legal consultation, contact the lawyers at Hissey Kientz, LLP by calling toll-free at 1-866-275-4454, or by filling out the free case evaluation form located on this page.

A

  • A. and S. Wilson Company (Allegheny)
  • A.B.E. Airport (Allentown)
  • A. Barletta & Sons (Hazleton)
  • A. Blumberg & Sons (Philadelphia)
  • A.C. & S., Incorporated (Philadelphia)
  • A. Darrah Contractors (Philadelphia)
  • A.E. Staley Manufacturing Company (Morrisville)
  • A.G. Vento Plumbing Company (Greenville)
  • A.H. Wirz Inc. (Chester)
  • A. Hirsch Air Company (Philadelphia)
  • A.I.W. Frank Corp (Exton)
  • A.K. Garrett Company (Philadelphia)
  • A.M. Byers Company (Ambridge)
  • A. P. Green (Philadelphia)
  • A.P. Green Fire Brick Company (Philadelphia)
  • A.P. Green Fire Brick Company (Tarentum)
  • A.P. Green Refractory Company (Philadelphia)
  • A. Pardee and Company (Hazleton)
  • A. Wilhelm Company (Reading)
  • A. Y. Michie (Philadelphia)
  • A and P Roberts Company (Pencoyd)
  • A and S. Wilson Company (Pittsburgh)
  • Abroqast Bastin Company (Allentown)
  • Academy of Music (Philadelphia)
  • Acands, Inc. (Pittsburgh)
  • Ace Motor Company (Philadelphia)
  • Achenbach & Butler, Inc. (Philadelphia)
  • Acme Hardesty Industries (Philadelphia)
  • Acme Heat Treat, Inc (Philadelphia)
  • Acme Iron & Metal Company (Philadelphia)
  • Acme Markets (Philadelphia)
  • Acme Markets Warehouse (Reading)
  • Acme Tea Company (Philadelphia)
  • Acme Warehouse (Philadelphia)
  • Acousticraft, Incorporated (Conshohocken)
  • Ada Lewis Junior High School Tulpehocken and Ardleigh Stree (Philadelphia)
  • Adams Mine (Irwin)
  • Adelta Manufacturing (Philadelphia)
  • Adley Express Company (Philadelphia)
  • Adrian Furnace (DuBois)
  • Advanced Specialty Company (Lansdale)
  • Aetna Chemical Company (Carnegie)
  • Aetna Standard (Ellwood City)
  • A French Spring Company (Pittsburgh)
  • A Garrison Foundry Company (Pittsburgh)
  • Aiken Medical Building (Pittsburgh)
  • Airforce Base (Pittsburgh)
  • Airmaster Inc (Philadelphia)
  • Air Production Sales (Johnstown)
  • Air Products & Chemicals (Allentown)
  • Air Products, Inc. (Pittsburgh)
  • Air Reduction Plant (Bethlehem)
  • Air Reduction Sales Company (Bethlehem)
  • Air Reduction Sales Company (Butler)
  • Air Reduction Sales Company (Enola)
  • Ajax Metals Company (Philadelphia)
  • A J Cameron Company (Philadelphia)
  • A J Haws and Sons Ltd (Johnstown)
  • Alamogordo Lumber Company (Scranton)
  • Alan Wood Iron and Steel Company (Conshohocken)
  • Alan Wood Iron and Steel Company (Swedeland)
  • Alan Wood Steel (Philadelphia)
  • Alan Wood Steel Company (Conshohocken)
  • Alan Wood Steel Company (Swedeland)
  • Albright Coal Company (Pottsville)
  • Albright College (Reading)
  • Alcoa (Canonsburg)
  • Alcoa (McKees Rocks)
  • Alcoa Building (Pittsburgh)
  • Alcoa Research Laboratories (New Kensington)
  • Alcoa Research Labs (Pittsburgh)
  • Alequippa Steel Company (Pittsburgh)
  • Alexander Good Elementary School (York)
  • Alexander Plumbing Company (Pittsburgh)
  • Alex Crow and Son (Philadelphia)
  • Algonquin Coal Company (Wilkes Barre)
  • Aliquippa and Southern R.R. (Aliquippa)
  • Aliquippa High School (Aliquippa)
  • Aliquippa Junior High School (Aliquippa)
  • Aliquippa Steel Company (Pittsburgh)
  • Aliquippa Works (Aliquippa)
  • Aliquippa Works (Woodlawn)
  • Alleghany Airport (Pittsburgh)
  • Alleghany High School (Allegheny)
  • Alleghany Power Company (Courtney)
  • Allegheney County Home For Destitute (Pittsburgh)
  • Allegheny Airlines Terminal (Pittsburgh)
  • Allegheny By Product Coke Company (Glassport)
  • Allegheny Chemical (Neville Island [Neville Township])
  • Allegheny City Electric Light Company (Allegheny)
  • Allegheny College (Meadville)
  • Allegheny Company Steam Heating Company (Pittsburgh)
  • Allegheny County Light Company (Pittsburgh)
  • Allegheny County Steam Heating Company (Pittsburgh)
  • Allegheny County Workhouse (Pittsburgh)
  • Allegheny Energy (Kittanning)
  • Allegheny Energy Supply Company (Courtney)
  • Allegheny Energy Supply Company (Greensburg)
  • Allegheny Energy Supply Company (Masontown)
  • Allegheny Energy Supply Company (Springdale)
  • Allegheny Furnace (Altoona)
  • Allegheny Gas Company (Allegheny City)
  • Allegheny General Hospital (Pittsburgh)
  • Allegheny Heating Company (Allegheny)
  • Allegheny Ludlum Steel Corporation (Brackenridge)
  • Allegheny Ludlum Steel Div (Washington)
  • Allegheny Power System (Masontown)
  • Allegheny Refining Company (Verona)
  • Allegheny Valley St Railway Company (Pittsburgh)
  • Allegheny Valley Street Railway Company (Tarentum)
  • Allegheny Valley Water Company (Tarentum)
  • Allegherry County Light Company (Pittsburgh)
  • Allen Laundry (Allentown)
  • Allen Products Company (Allentown)
  • Allentown-Bethlehem Gas Company (Allentown)
  • Allentown and Kurtztown Traction Company (Allentown)
  • Allentown High School (Allentown)
  • Allentown Hospital (Allentown)
  • Allentown Portland Cement Company (Allentown)
  • Allentown Rapid Service Ice Company (Allentown)
  • Allentown State Hospital (Allentown)
  • Allentown Water Works (Allentown)
  • Allenwood Steel (Conshohocken)
  • Allenwood Steel (Norristown)
  • Allied Chemical & Dye Corporation (Frankford)
  • Allied Chemical (Philadelphia)
  • Allied Chemical and Dye Corporation (Philadelphia)
  • Allied Chemical Corp (Bethlehem)
  • Allied Chemical Corporation (Newell)
  • Allied Chemical Corporation (Sunbury)
  • Allied Chemical Corporation – Baker & Adamson Plant (Marcus Hook)
  • Allied Services Handicapped (Scranton)
  • Allied Signal (Philadelphia)
  • Allis-Chalmers Manufacturing Company (York)
  • Alloy Rod Plant (Hanover)
  • Alon Engineering Inc (Creighton)
  • Alpha Portland Cement Company (Easton)
  • Alpha Portland Cement Company (Martins Creek)
  • Alpha Portland Cement Company (Pittsburgh)
  • Alpine Knitting Mills (Pittston)
  • Altoona and Logan Valley Electric Railway Company (Altoona)
  • Altoona Car Shops (Altoona)
  • Altoona High School (Altoona)
  • Altoona Logan Valley Elec. Railway Company (Altoona)
  • Altoona School District (Altoona)
  • Altoona Vocational Technology High School (Altoona)
  • Aluminum Company of America (Erie)
  • Aluminum Company of America (Lancaster)
  • Aluminum Company of America (Lebanon)
  • Aluminum Company of America (Philadelphia)
  • Aluminum Company of America (Pittsburgh)
  • Aluminum Smelting Corporation (Philadelphia)
  • Am. Department (Middletown)
  • Amalgamated Silk Corporation (Allentown)
  • Amber Realty Company (Philadelphia)
  • Ambridge Plant (Ambridge)
  • Ambrose Augusterfer Corporation (Hollidaysburg)
  • A M Byers and Company (Pittsburgh)
  • Am Byers Company Inc (Pittsburgh)
  • Amchem Products Inc (Ambler)
  • Amergen Energy Company (Middletown)
  • America Magnesia and Covering Company (Plymouth Meeting)
  • American. Steel and Wire Company (Braddock)
  • American Asbestos (Norristown)
  • American Austin Car Company (Butler)
  • American Ax and Tool Company (Beaver Falls)
  • American Axe and Tool Company (Glassport)
  • American Bank Note Company (Philadelphia)
  • American Bantam Car Company (Butler)
  • American Baptist Publication Society (Philadelphia)
  • American Brake Shoe (New Castle)
  • American Brake Shoe Company (Meadville)
  • American Bridge Company (Ambridge)
  • American Bridge Company (Pencoyd)
  • American Bridge Company (Philadelphia)
  • American Bridge Company (Pittsburgh)
  • American Bridge Division (Northampton)
  • American Bridge Shipyard (Pittsburgh)
  • American Can (Fairless)
  • American Can Company (Chambersburg)
  • American Can Company (Philadelphia)
  • American Car & Foundry (Milton)
  • American Car & Foundry (Wilkes Barre)
  • American Car & Foundry Industries, Inc. (Berwick)
  • American Chain & Cable (Reading)
  • American Chain and Cable (Braddock)
  • American Cigar Company (Philadelphia)
  • American Clean Tile (Lansdale)
  • American Coke Company (Pittsburgh)
  • American Cyanamid Company (Bridgeville)
  • American Dredge (Chester)
  • American Dredging (Philadelphia)
  • American Dyewood Company (Chester)
  • American Engineering Company (Philadelphia)
  • American Gas and Electic Company (Philadelphia)
  • American Gas Company (West Chester)
  • American Iron and Steel Company (Lebanon)
  • American Lace Manufacturing Company (Germantown)
  • American Locomotive Company (Allegheny)
  • American Locomotive Company (Chester)
  • American Locomotive Company (Latrobe)
  • American Motors (DuBois)
  • American Olean Tile (Quakertown)
  • American Olean Tile Company, Inc (Lansdale)
  • American Paper Products Company (Lancaster)
  • American Pile Fabric Company (Philadelphia)
  • American Radiator and Standard Sanitary Corp (Pittsburgh)
  • American Railways Company (Philadelphia)
  • American Rolling Mill (Butler)
  • American S. and W. Company (Allegheny)
  • American Salvage Company (Philadelphia)
  • American Sheet and Tin Plate Company (New Castle)
  • American Sheet and Tin Plate Company (New Kensington)
  • American Sheet and Tin Plate Company (Pittsburgh)
  • American Sheet and Tin Plate Company (Scottdale)
  • American Sheet and Tin Plate Company (Vandergrift)
  • American Sheet Steel Company (Pittsburgh)
  • American Steel and Wire Company (Allentown)
  • American Steel and Wire Company (Donora)
  • American Steel and Wire Company (Pittsburgh)
  • American Steel and Wire Company (Rankin)
  • American Stores Company Inc (Philadelphia)
  • American Sugar (Philadelphia)
  • American Telephone & Telegraph (Wayne)
  • American Tube and Iron Company (Middletown)
  • American Type Founders Company (Philadelphia)
  • American Viscose (Philadelphia)
  • American Viscose Corp (Meadville)
  • American Viscose Corporation (Marcus Hook)
  • American Warming and Ventilating Company (Altoona)
  • American Warming and Ventilating Company (Pittsburgh)
  • American Water Works & Electric Company (Pittsburgh)
  • American Water Works and Guarantee Company (Pittsburgh)
  • American Welding Company (Carbondale)
  • America S. and W. Company (Pittsburgh)
  • America Sheet Steel Company (Pittsburgh)
  • America Sheet Tin Plate Company (Pittsburgh)
  • America Steel and Wire Company (Beaver Falls)
  • America Steel and Wire Company (Pittsburgh)
  • America Steel Hoop Company (Allegheny)
  • America Steel Hoop Company (Pittsburgh)
  • America Water Works and Guarantee Company (Pittsburgh)
  • Americn Steel and Wire Company (Pittsburgh)
  • Amer Iron Steel Manufacturing Company (Lebanon)
  • Amer Pipe Manufacturing Company (Philadelphia)
  • Amer Sheet and Tin Plate Company (Monessen)
  • Amer Sheet and Tin Plate Company (Pittsburgh)
  • Amer Sheet Steel Company (McKeesport)
  • Amer Sheet Steel Company (Pittsburgh)
  • Amer Steel Hoop Company (Pittsburgh)
  • Am Gas Electric Company (Philadelphia)
  • Amjohn Inc. (Carnegie)
  • A Moe & Company (Philadelphia)
  • Amoroso Bakery (Philadelphia)
  • Amp, Incorporated (Harrisburg)
  • Amstar Sugar Factory (Philadelphia)
  • Anchor Brewing Company (Tarentum)
  • Anchor Hocking Glass Company (Connellsville)
  • Anchor Rooking Company (Connellsville)
  • Anita Coal Mining Company (Punxsutawney)
  • Annex Hotel Company (Pittsburgh)
  • Anselm School (Pittsburgh)
  • Anthony Compola Plumbing (Philadelphia)
  • Antioch Building (Pittsburgh)
  • Ap Green F B Company of W Ny (Titusville)
  • Ap Green Refractories Division (Tarentum)
  • Ap Green Refractories Remmey Division (Philadelphia)
  • Apollo Iron and Steel Company (Vandergrift)
  • Apollo Iron Steel Company (Pittsburgh)
  • Appleton Papers Inc. (Roaring Springs)
  • Applied Energy Services Inc (Monaca)
  • Arbogast & Bastlan Company (Allentown)
  • Arbuckle and Company (Pittsburgh)
  • Arcade Building (Philadelphia)
  • Arcade Real Estate Company (Philadelphia)
  • Architectural Steel (Philadelphia)
  • Arco Atlantic Refinery (Philadelphia)
  • Arco Oil Refinery (Philadelphia)
  • Arco Polymer (Monaca)
  • Arden Verner Painting (Springdale)
  • Argo Mills (Philadelphia)
  • Argyl Manufacturing Company (Pen Argyl)
  • Armco (Pittsburgh)
  • Armco Steel (Sharon)
  • Armco Steel Corp (Ambridge)
  • Armco Steel Corporation (Butler)
  • Armour and Company (Philadelphia)
  • Armstrong Brothers and Company (Pittsburgh)
  • Armstrong Contracting & Supply (Lancaster)
  • Armstrong Cork Company (Beaver Falls)
  • Armstrong Cork Company (Lancaster)
  • Armstrong Cork Company (Pittsburgh)
  • Armstrong Inc (Pittsburgh)
  • Armstrong Power Station (Kittanning)
  • Armstrong World Industries (Lancaster)
  • Army Reserve Center (Clearfield)
  • Art Loom Corp (Philadelphia)
  • Asbestos, Shingle, Slate and Sheathing Company (Ambler)
  • Asbestos and Magnesia Manufacturing Company (Port Kennedy)
  • Ashland Emery and Corumdum Company (Easton)
  • Asphalt Paving & Supply (Norristown)
  • Asphalt Plant (Pittsburgh)
  • Asten-Hill (Philadelphia)
  • A T & T (Allentown)
  • A T & T (Pottstown)
  • A T & T (Wayne)
  • A T & T Company (Reading)
  • At&t Technologies (Allentown)
  • Atec Building (Pittsburgh)
  • Athletic Club of The Schuylkill Navy (Philadelphia)
  • Athos Steel Mill (Philadelphia)
  • Atlantic & Gulf Company (Philadelphia)
  • Atlantic Baking Group (Pittsburgh)
  • Atlantic City Railroad (Philadelphia)
  • Atlantic Crushed Coke Company (Greensburg)
  • Atlantic Electric Motor (Philadelphia)
  • Atlantic Flour Mills (Philadelphia)
  • Atlantic Metals Company (Philadelphia)
  • Atlantic Oil Refinery (Philadelphia)
  • Atlantic Pipe Line Company (Philadelphia)
  • Atlantic Port Contractors (Philadelphia)
  • Atlantic Refining Company (Chester)
  • Atlantic Refining Company (Philadelphia)
  • Atlantic Refining Company (Pittsburgh)
  • Atlantic Richfield Company (Philadelphia)
  • Atlas Cement Company (Northampton)
  • Atlas Portland Cement Company (Northampton)
  • Atomic Power Station (Pittsburgh)
  • Atomic Power Station (Shippingport)
  • Auditorium Danville State Hopital (Danville)
  • August Wagner Breweries Inc (Pittsburgh)
  • Auto Car Company (Ardmore)
  • Auto Steam Equipment Company (Philadelphia)
B
  • B & O Railroad (Connellsville)
  • B & W Main Tube Plant (Beaver Falls)
  • B & W Main Tube Plant (Pittsburgh)
  • B.F. Refinery (Marcus Hook)
  • Babcock & Wilcox Company (Beaver)
  • Babcock & Wilcox Company (Beaver Falls)
  • Babcock & Wilcox Company (Koppel)
  • Babcock & Wilcox Koppel Works (Beaver Falls)
  • Babcock and Wilcox Company (Ambridge)
  • Babcock and Wilcox Tubular Products Div (Beaver Falls)
  • Badeer Adamson and Company (Philadelphia)
  • Badenhauser (Cornwell Heights)
  • Badger Corp Benzoil Plant 8 (Clairton)
  • Badger Us Steel Chemical Plt (Neville Island [Neville Township])
  • Badwell Company (Harrisburg)
  • Baeder Adamson and Company (Philadelphia)
  • Bailey Banks and Biddle Building (Philadelphia)
  • Bailey High School (Pittsburgh)
  • Baker, Smith and Company (Pittsburgh)
  • Baker Carver & Morrel (Philadelphia)
  • Baker Chain and Wagon Iron Manufacturing Company (Allegheny)
  • Baker Company J. E. (York)
  • Baker Elementary School (Altoona)
  • Baldt Anchor Chain and Forge Company (Chester)
  • Baldt Anchor Company (Chester)
  • Baldt Anchor Forge Company (Chester)
  • Baldwin – Lima-Hamilton (Eddystone)
  • Baldwin Automotive (Essington)
  • Baldwin Lima Hamilton (Chester)
  • Baldwin Locomotive Works (Burnham)
  • Baldwin Locomotive Works (Eddystone)
  • Baldwin Locomotive Works (Philadelphia)
  • Ball Engine Company (Erie)
  • Ballied Chemical & Dye Corporation (Philadelphia)
  • Balot Anchor Forge Company (Chester)
  • Baltimore & Ohio Railroad Company (DuBois)
  • Baltimore & Ohio Railroad Company (New Castle)
  • Baltimore and Ohio Railroad (Connellsville)
  • Baltimore and Ohio Railroad (Philadelphia)
  • Baltimore and Ohio Railroad Company (Pittsburgh)
  • Bandw Tubular Products Div (Koppel)
  • Bangor Electric Light, Heat and Power Company (Bangor)
  • Bank of North America (Philadelphia)
  • Barber Asphalt Paving Company (Philadelphia)
  • Bard Insulation Company (Chambersburg)
  • Bargain City (Philadelphia)
  • Barkley Apartments (Philadelphia)
  • Barnes Construction Company (New Castle)
  • Barnum Breaker (Pittston)
  • Barnum Coliery (Pittston)
  • Barone Launch Service (Philadelphia)
  • Barret Div Allied Chemical and Dye Corporation (Philadelphia)
  • Barrett Chemical (Philadelphia)
  • Barrett Company (Bethlehem)
  • Barrett Div Allied Chemical and Dye Corp (Frankford)
  • Barrett Div Allied Chemical and Dye Corp (Philadelphia)
  • Barrett Manufacturing Company (Frankford)
  • Barrett Manufacturing Company (Philadelphia)
  • Barretts Roofing (Philadelphia)
  • Barron College (Erie)
  • Barrones Launch Serv Inc (Philadelphia)
  • Bartels Brewing Company (Kingston)
  • Bashland Chemical Company (Pittsburgh)
  • Basic Construction Company (Philadelphia)
  • Bath Portland Cement Company (Bath)
  • Baugh Chemical (Philadelphia)
  • Baunner Island Elect Steam Sta (York Haven)
  • Beacon Light Company (Chester)
  • Beam Yard Power House (Johnstown)
  • Bear Gap Water Company (Shamokin)
  • Bear Valley Number (Williamstown)
  • Bear Valley Shaft (Williamstown)
  • Beaumont Birch Company (Philadelphia)
  • Beaver County Geriatric Ctr (Beaver)
  • Beaver County Home and Hospital (Beaver)
  • Beaver Falls Medical Center (Beaver Falls)
  • Beaver Valley General Hospital (New Brighton)
  • Beaver Valley Power Station (Shippingport)
  • Beaver Valley Traction Company (Beaver)
  • Beaver Valley Traction Company (Beaver Falls)
  • Beaver Wire Company (Beaver Falls)
  • Bechtel Steel Plant (Martins Creek)
  • Becks Run Station (Pittsburgh)
  • Beckwith Mach (Harrisburg)
  • Beeber Junior High School (Philadelphia)
  • Belementis Pigments Inc (Easton)
  • Bellefield Boder Plant (Pittsburgh)
  • Bellefield Hotel (Pittsburgh)
  • Bellefonte Electric Company (Bellefonte)
  • Bellefonte Gas Company (Bellefonte)
  • Belleour Stratford Hotel Company (Philadelphia)
  • Belliott Turbomachinery Company Inc (Jeanette)
  • Bell Telephone (McKees Rocks)
  • Bell Telephone (Pottstown)
  • Bell Telephone (Wayne)
  • Bell Telephone Company (Connellsville)
  • Bell Telephone Company (Philadelphia)
  • Bell Telephone Company (Pittsburgh)
  • Bell Telephone Company (Sharpsburg)
  • Bell Telephone Company of Pa. (Warren)
  • Belmont Oil Works (Philadelphia)
  • Bement Miles and Company (Philadelphia)
  • Bendix Aircraft (Philadelphia)
  • Bendix Corporation (Wilkes Barre)
  • Bendix Westinghouse Company (Wilmerding)
  • Ben Franklin Elementary School (Levittown)
  • Ben Franklin Hotel (Philadelphia)
  • Benjamin Foster Company (Philadelphia)
  • Benjamin Franklin Elementary (Philadelphia)
  • Benjamin Franklin Jr High School (New Castle)
  • Benjamin Rush Middle School (Philadelphia)
  • Bennett & Aspen (Philadelphia)
  • Bennett Station (Wilkes Barre)
  • Bennett Steel (Wilkes Barre)
  • Benzol Products Company (Marcus Hook)
  • Bepsilon Zeta Alumni Association Pi (Philadelphia)
  • Berks Refining Company (Pottstown)
  • Berliner Company Joseph (Philadelphia)
  • Bers & Company (Philadelphia)
  • Berwick Forge and Fabricating (Berwick)
  • Berwind White Coal Manufacturing Company (DuBois)
  • Berwind White Coal Mining Company (Windber)
  • Berwin White Coal Company (Windber)
  • Berwin White Coal Mining Company (Philadelphia)
  • Beryllium Corp of Pennsylvania (Temple)
  • Beryllium Corporation (Hazleton)
  • Beryllium Corporation (Reading)
  • Berylluim Corp (Hazleton)
  • Bessemer and Lake Erie Railroad Company (Greenville)
  • Bessemer Coke Company (Pittsburgh)
  • Bessemer Steel Works (Johnstown)
  • Bethel Senior High School (Pittsburgh)
  • Bethleham Steel Company (South Bethlehem)
  • Bethlehem City Water Company (South Bethlehem)
  • Bethlehem Cornwall (Cornwall)
  • Bethlehem Corporation (Easton)
  • Bethlehem Fairfield Shipyard Incorporated (Bethlehem)
  • Bethlehem Iron Works (Bethlehem)
  • Bethlehem Lukens Plate (Coatesville)
  • Bethlehem Plant (Bethlehem)
  • Bethlehem Silk Company (Bethlehem)
  • Bethlehem Steel (Ambridge)
  • Bethlehem Steel Company (Allentown)
  • Bethlehem Steel Corp (Lebanon)
  • Bethlehem Steel Corporation (Cornwall)
  • Bethlehem Steel Corporation (Easton)
  • Bethlehem Steel Corporation (Franklin)
  • Bethlehem Steel Corporation (Hanover)
  • Bethlehem Steel Corporation (Homestead)
  • Bethlehem Steel Corporation (Neville Island [Neville Township])
  • Bethlehem Steel Corporation (Steelton)
  • Bethlehem Steel Mill (Pittsburgh)
  • Bethlehem Steel Shipyard (Bethlehem)
  • Bettis Atomic Power Laboratory (West Mifflin)
  • Betty Brackly-Lynsk (Philadelphia)
  • B F Goodrich Company (Oaks)
  • Bickley Furnaces, Incorporated (Philadelphia)
  • Bilc Super Market (Philadelphia)
  • Binder Cooperage (Philadelphia)
  • Bindley Hardware Company (Pittsburgh)
  • Bingham House (Philadelphia)
  • Bird Coleman Furnaces (Cornwall)
  • Birdsboro Corp (Birdsboro)
  • Bissell and Company (Pittsburgh)
  • Black and Germer (Erie)
  • Black Liquor Oxidation System (Spring Grove)
  • Blaw-Knox Company (Ellwood City)
  • Blaw-Knox Company (Pittsburgh)
  • Blooming Mill (Johnstown)
  • Bloomsburg Heating Company (Bloomsburg)
  • Blossom Products Corporation (Allentown)
  • Blue Ridge Winkler Textile Company (Bangor)
  • Blumenthal Brothers (Philadelphia)
  • Board of Education (Mechanicsburg)
  • Board of Education (Pittsburgh)
  • Board of Education Buildings (Philadelphia)
  • Bodwell Company (Harrisburg)
  • Boeing Company (Eddystone)
  • Boeing Vertol (Eddystone)
  • Boeing Vertol Company (Philadelphia)
  • Boericke and Tafel Blding. (Philadelphia)
  • Boger & Crawford (Philadelphia)
  • Boggs and Buhl (Allegheny)
  • Bok Technical High School (Philadelphia)
  • Bollinger Brothers (Pittsburgh)
  • Bonair Foundry Company (Philadelphia)
  • Bonney Forge & Tool (Allentown)
  • Bonney Frg Division (Allentown)
  • Bonney Tool & Forge Works (Allentown)
  • Bon Secours Holy Family Hospital (Altoona)
  • Borg Warner Corporation (York)
  • Bornet Cleaners (Philadelphia)
  • Bornot Inc. (Philadelphia)
  • Borough of Ford City (Ford City)
  • Borough of Phoenixville (Phoenixville)
  • Borough of Quakertown (Quakertown)
  • Borzillo Bakery (Norristown)
  • Boston & Ohio Railroad (Connellsville)
  • Boston & Ohio Railroad (New Castle)
  • Boston & Ohio Railroad (Philadelphia)
  • Boston & Ohio Railroad (Pittsburgh)
  • Botany 500 (Philadelphia)
  • Botfield Refractories Company (Philadelphia)
  • Bowman Trucking (Indiana)
  • Boyertown Burial Casket Company (Boyertown)
  • BP (Chester)
  • Bpeco Energy Company (Philadelphia)
  • Bp Oil Corporation (Marcus Hook)
  • Bp Oil Corporation (Philadelphia)
  • Brackenridge Works Soaking Pit (Brackenridge)
  • Braddock and Turtte Creek Electric Railway (Braddock)
  • Braddock Electric Railway Company (Braddock)
  • Braddock General Hospital (Braddock)
  • Braddock Hospital (Pittsburgh)
  • Braddock Wire Company (Pittsburgh)
  • Braddock Wire Company (Rankin)
  • Bradford Oil Refining (Bradford)
  • Bradford Supply Company (Bradford)
  • Bradlee and Company (Philadelphia)
  • Brandley Smith (Philadelphia)
  • Brandywine Mushroom Company (West Chester)
  • Bregy Elementary School (Philadelphia)
  • Bricklayer\’s Union Local 1 (Philadelphia)
  • Bridge Shop (Pencoyd)
  • Bridgeville Plant (Bridgeville)
  • Brier Hill Coke Company (Uniontown)
  • Bristol Water Works (Bristol)
  • Brithish Petro (Marcus Hook)
  • British Petroleum (Trainer)
  • Broad St. Station (Philadelphia)
  • Brockway Glass (Clarion)
  • Brockway Glass Company (Washington)
  • Bromley Lace Mill (Philadelphia)
  • Brown and Company Inc (Pittsburgh)
  • Brown Brothers and Company (Philadelphia)
  • Browning, King, and Company B\’Lding (Philadelphia)
  • Brown Instrument Company (Philadelphia)
  • Bruce Mansfield Power Plant (Shippingport)
  • Brunner Island Power Plant (York Haven)
  • Brunot\’s Island Powerhouse (Pittsburgh)
  • Brush Electric Light Company (Philadelphia)
  • Bryant School (Philadelphia)
  • Bryden Horseshoe Company (Catasauqua)
  • Bryn Mawr College (Bryn Mawr)
  • Bryn Mawr Hospital (Bryn Mawr)
  • Bryton Chemical (Trainer)
  • Buckhorn Portland Cement Company (Philadelphia)
  • Bucknell University (Kingston)
  • Buck Run Coal Company (Minersville)
  • Bucyrus – Erie (Glassport)
  • Budd Company (Bridgeport)
  • Budd Company (Conshohocken)
  • Budd Company (Philadelphia)
  • Buffalo and Susquehanna Coal and Coke Company (DuBois)
  • Buhl Steel Company (Sharon)
  • Buick Manufacturing Division (Philadelphia)
  • Bulletin Building (Philadelphia)
  • Buono Bakery (Chester)
  • Bureau of Mines Building (Pittsburgh)
  • Bureau of Water Department of Parks and Public Property (Reading)
  • Burke, Parsons & Bowlby (DuBois)
  • Burle Industries Inc (Lancaster)
  • Bustleton Elementary (Philadelphia)
  • Busx Corp (Pittsburgh)
  • Butler (Philadelphia)
  • Butler Colliery (Pittston)
  • Butler County Memorial Hospital (Butler)
  • Butler Health System (Butler)
  • Butler High School (Butler)
  • Butler Light, Heat and Power Company (Butler)
  • Butler State Memorial Hospital (Butler)
  • Butler Township (Butler)
  • Butler Works (Butler)
  • Byberry State Mental Hospital (Philadelphia)
C
  • C.A. Spalding (Philadelphia)
  • C.C. and E. P. Townsend Company (New Brighton)
  • C.C. Knight and Company\’s Building (Philadelphia)
  • C. E. Monday and Company (Philadelphia)
  • C. H. Bradley and Company (Pittsburgh)
  • C.H. Geist Company (Philadelphia)
  • C.H. Wheller Manufacturing. Company (Philadelphia)
  • C. Howard Mercy State Hospital (Pittsburgh)
  • C.L. Miller Company (Scottdale)
  • C. Schmidt and Sons Brewing Company (Philadelphia)
  • Caledonian Dye Works (Philadelphia)
  • Callery Chemical Company (Callery)
  • Calumet Lubricants Company (Rouseville)
  • Cambria Iron Company (Johnstown)
  • Cambria Leasing Corporation (Johnstown)
  • Cambria Library Association (Johnstown)
  • Cambria Steel Company (Johnstown)
  • Cambria Steel Company (Philadelphia)
  • Camden Copper Works (Philadelphia)
  • Camden Fibre Mills (Philadelphia)
  • Cameron Colliery (Shamokin)
  • Cametoo Company (Pittsburgh)
  • Campbell Soup Company (Philadelphia)
  • Canonsberg Iron and Steel Company (Pittsburgh)
  • Canonsburg Iron and Steel Works (Canonsburg)
  • Canonsburg Steel and Iron Company (Canonsburg)
  • Capitol Products Company (Mechanicsburg)
  • Carbondale High School (Carbondale)
  • Carbondale Machine Company (Carbondale)
  • Carbon Malleable Company (Lancaster)
  • Carbon Steel Company (Pittsburgh)
  • Carbon Transit Company (Mauch Chunk)
  • Carey Brothers Wall Paper Manufacturing Company (Philadelphia)
  • Carey Manufacturing (Plymouth Meeting)
  • Carlin William Steam Boilers (Jeanette)
  • Carlisle Barracks (Carlisle)
  • Carlisle Gas and Water Company (Carlisle)
  • Carlson Manufacturing Company (Carnegie)
  • Carnecie Ill. Steel Company (Etna)
  • Carnegie-Illinois Steel Corporation (Allegheny City)
  • Carnegie-Illinois Steel Corporation (Pittsburgh)
  • Carnegie-Illinois Steel Corporation (Rankin)
  • Carnegie Brothers and Company Lim. (Pittsburgh)
  • Carnegie Ill. Steel Company (Pencoyd)
  • Carnegie Illinois Steel Corporation (Irvin)
  • Carnegie Institute of Technology (Pittsburgh)
  • Carnegie Library (Munhall)
  • Carnegie Library Extension (Pittsburgh)
  • Carnegie Mellon University (Pittsburgh)
  • Carnegie Natural Gas Company (Pittsburgh)
  • Carnegie Natural Gas Company (Washington)
  • Carnegie Phipps and Company (Pittsburgh)
  • Carnegie Phipps and Company Ltd (Munhall)
  • Carnegie Sheet Company (Pittsburgh)
  • Carnegie Steel Company (Allegheny)
  • Carnegie Steel Company (Clairton)
  • Carnegie Steel Company (Duquesne)
  • Carnegie Steel Company (Farrell)
  • Carnegie Steel Company (Homestead)
  • Carnegie Steel Company (Munhall)
  • Carnegie Steel Company (New Castle)
  • Carnegie Steel Company (Pittsburgh)
  • Carnegie Steel Company (Rankin)
  • Carnegie Steel Company (Sharon)
  • Carnegie Steel Works (Munhall)
  • Carnegie Tech (McKees Rocks)
  • Carnegie Technical Schools (Pittsburgh)
  • Carnegie Tube Company (Carnegie)
  • Carpenters Local 2850 (Philadelphia)
  • Carpenter Steel Company (Reading)
  • Carpenters Union – Local 1462 (Philadelphia)
  • Carrie Furnace (Irvin)
  • Carrie Furnace Company (Pittsburgh)
  • Carrie Furnace Company (Rankin)
  • Carson Industrial Development Corporation (Pittsburgh)
  • Castanea Paper Company (Johnsonburg)
  • Catalytic Incorporated (Philadelphia)
  • Catasauqua Manufacturing Company (Catasauqua)
  • Caterpillar Tractor Company (York)
  • C B Comstock (Pittsburgh)
  • C C Harrison Building (Philadelphia)
  • Cedar Cliff Silk Company (Chambersburg)
  • Celotex (Philadelphia)
  • Central Catholic High School (Allentown)
  • Central Cement Company (Coplay)
  • Central Dist. and Printing Tel Company (Pittsburgh)
  • Central Gas & Electric (Middletown)
  • Central High School Ogontz & Olney Avenues (Philadelphia)
  • Central Iron and Steel Company (Harrisburg)
  • Central Land Company (Pittsburgh)
  • Central New Jersey Railroad (Bethlehem)
  • Central Power Plant (Pittsburgh)
  • Central Railroad of New Jersey (Ashley)
  • Central Works (Lebanon)
  • Certain-Teed Production Corporation (York)
  • Certainteed Corporation (Ambler)
  • Certainteed Products Company (Philadelphia)
  • C F Simonins and Sons (Philadelphia)
  • Chamberlain Coal Company (Pottsville)
  • Chamberlain Corporation (Scranton)
  • Chamberlain Steel (Scranton)
  • Chamberot Commerce Building (Pittsburgh)
  • Chambersburg Hospital (Chambersburg)
  • Chambersburg Powerhouse (Chambersburg)
  • Champion Constn Company (Philadelphia)
  • Charleroi Construction Company (Pittsburgh)
  • Charleroi Plate Glass Company (Pittsburgh)
  • Charles Lenning, Tacony Chemical Works (Philadelphia)
  • Charles Lenning and Company, Inc. (Philadelphia)
  • Charmin Paper Company (Mehoopany)
  • Charmin Paper Company (Scranton)
  • Charmin Paper Products Company (Mehoopany)
  • Charmin Paper Rod Company (Mehoopany)
  • Chartiers Valley School Dist (Pittsburgh)
  • Chartier Valley High School (Pittsburgh)
  • Chas. E. Johnson and Company (Philadelphia)
  • Chas. E. Monday and Company (Philadelphia)
  • Chas. E Langcake (Philadelphia)
  • Chas. H. Caspar For Class and Nachod Bwg. Company (Philadelphia)
  • Chas. T. Schoen (Philadelphia)
  • Chas Lachman Company, Inc (Phoenixville)
  • Chas St Suppes (Johnstown)
  • Chatham Center (Pittsburgh)
  • Chelten Supply House (Philadelphia)
  • Chemical Concentrates (Fort Washington)
  • Cherion and Radnor Gas and Electric Company (Wayne)
  • Cherokee Plant (Danville)
  • Cherry River Paper Company (Philadelphia)
  • Chester High School (Chester)
  • Chester Lace Company (Chester)
  • Chester Paper Company (Chester)
  • Chester Processing Company (Chester)
  • Chestnut Hill Hospital (Philadelphia)
  • Cheswick Power Station (Springdale)
  • Chew-Bittel Company (Willow Grove)
  • Chicago Bridge & Iron Company (Greenville)
  • Chicago Pneumatic Tool Company (Pittsburgh)
  • Chicago Pneumtic Tool Company (Franklin)
  • Childrens Homeopathic Hospital (Philadelphia)
  • Children\’s Hospital (Philadelphia)
  • Children\’s Hospital (Philadelphia)
  • Children\’s Hospital (Pittsburgh)
  • Children\’s Reception Welfare (Philadelphia)
  • Chilled Roll Foundry (Vandergrift)
  • Chipman Knitting Company (Easton)
  • Chipman Knitting Mills (Easton)
  • C H Maslin and Sons (Philadelphia)
  • Chocura (Philadelphia)
  • Christ M E Church (Pittsburgh)
  • Christopher Mining Company (Washington)
  • Cities Service Oil Company (Philadelphia)
  • Citizens Bank (Latrobe)
  • Citizens Elect Light Company (Braddock)
  • Citizens Electric Ill Company (Pittston)
  • Citizens Electric Light Heat and Power Company (Lancaster)
  • Citizens General Hosp. (New Kensington)
  • Citizens Light Heat and Power Company (Johnstown)
  • Citizens Water Supply Company (Washington)
  • City Electric Light Plant (Allegheny City)
  • City Hall & Courthouse (Easton)
  • City Mill (Philadelphia)
  • City of Lancaster Pa Department of Water (Lancaster)
  • City of McKeesport Water Department (McKeesport)
  • City of Philadelphia – Dept. of Streets Sanitation (Philadelphia)
  • City of Philadelphia – Yard & Garage Office Building (Philadelphia)
  • City of Pittsburgh Brilliant Pumping Station (Pittsburgh)
  • City of Pittsburgh Mayview Plant (Pittsburgh)
  • Civic Arena (Pittsburgh)
  • Civic Center (Philadelphia)
  • Claire Furnace Company (Sharpsville)
  • Clairton By-Products Coke Works (Clairton)
  • Clairton High School (Clairton)
  • Clairton Steel Works and Furnaces (Clairton)
  • Clarion Mills (Johnsonburg)
  • Clarion Steel Works (Pittsburgh)
  • Clay Mill Works (Clearfield)
  • Clearfield Bank (Philadelphia)
  • Clearfield High School (Clearfield)
  • Clearfield Hospital (Clearfield)
  • Clear Spring Coal Company (Pittston)
  • Clearview Elementary School (Bethlehem)
  • Cleaver Brooks Company (Lebanon)
  • Cleveland Worsted Mills (Philadelphia)
  • Clinton G. Hodder (Pittsburgh)
  • Clinton Iron and Steel Company (Pittsburgh)
  • Closure Plant (Lancaster)
  • Coal and Coke By Products Company (Pittsburgh)
  • Coal Brook Mine (Carbondale)
  • Coalfax Power Station (Cheswick)
  • Coatesville Rolling Mill Company (Coatesville)
  • Cochrane D&V Crane Corporation (King of Prussia)
  • Coke (Philadelphia)
  • Coke Boiler House (Bethlehem)
  • Coke Oven Div (Bethlehem)
  • Colfax Station (Springdale)
  • College Park (Monroeville)
  • Collieries Supply and Equipment Company (Philadelphia)
  • Colliery Number 18 (Wanamie)
  • Colliery Supply and Equipment (Philadelphia)
  • Colonial Aluminum & Smelting Company (Columbia)
  • Colonial Berks Real Estate (Reading)
  • Colonial Colheries Company (Minersville)
  • Colonial Colheries Company (Mount Carmel)
  • Colonial Steel Company (Monaca)
  • Colonial Steel Company (Pittsburgh)
  • Colonial Trust Company (Reading)
  • Colt Industries (Midland)
  • Colt Industries Crucible, Inc. (Midland)
  • Columbia Bridge Company (Carnegie)
  • Columbia Hospital (Wilkinsburg)
  • Columbia Metals Company (Columbia)
  • Columbian Carbon Company (Philadelphia)
  • Columbia Plumbing Supply House (Philadelphia)
  • Columbia Rolling Mill Company (Harrisburg)
  • Columbia Water Company (Columbia)
  • Combustion Engineering, Inc. (Port Kennedy)
  • Combustion Engineering, Inc. (Scranton)
  • Cominsky Warehouse (Windber)
  • Commerce Square (Philadelphia)
  • Commerce St. Building (Philadelphia)
  • Commercial Alcohol (Philadelphia)
  • Commercial Gazette Building (Pittsburgh)
  • Commons At Fallsington (Morrisville)
  • Commonwealth of Pennsylvania (Bellefonte)
  • Commonwealth of Pennsylvania (Clarion)
  • Commonwealth of Pennsylvania (Indiana)
  • Commonwealth Title Insurance and Trust Company (Philadelphia)
  • Commonwealth Trust Company (Pittsburgh)
  • Community Central Energy Corp (Scranton)
  • Conemaugh Power Station (Johnstown)
  • Conemaugh Power Station (New Florence)
  • Conemaugh Station (Huff)
  • Conemaugh Station (Pittsburgh)
  • Conemaugh Valley Memorial Hospital (Johnstown)
  • Conestoga Traction Company (Lancaster)
  • Conewango Refining Company (Warren)
  • Congoleum (Marcus Hook)
  • Congoleum Nairn Inc. (Marcus Hook)
  • Connelly Containers (Philadelphia)
  • Connelly Paper Company (Philadelphia)
  • Conoqleum Company (Marcus Hook)
  • Conrail (Enola)
  • Conrail (Philadelphia)
  • Conshohocken Worsted Company (Conshohocken)
  • Conshohocken Worsted Mills Company (Philadelphia)
  • Consolidated Cigar Company (Lancaster)
  • Consolidated Coal Company (Library)
  • Consolidated Gas Supply Corp (Pittsburgh)
  • Consolidated Ice Company (Pittsburgh)
  • Consolidated Rail Corporation (Philadelphia)
  • Consolidated S. and W. Company (Allentown)
  • Consolidated S. and W. Company (Beaver Falls)
  • Consolidated S. and W. Company (Pittsburgh)
  • Consolidated S. and W. Company (Rankin)
  • Consolidated Traction Company (Pittsburgh)
  • Consumers Gas Company (Reading)
  • Consumers Light Company (Plymouth)
  • Consumers Power (Erie)
  • Consumer\’s Mining (Harmarville)
  • Container Corporation of America (Philadelphia)
  • Continental Can (West Mifflin)
  • Continental Diamond Fibre (Bridgeport)
  • Continental Distilling Company (Philadelphia)
  • Continental Mills Inc (Philadelphia)
  • Continental Rubber Works (Erie)
  • Continental Wire & Cable (York)
  • Convention Center (Philadelphia)
  • Convent of Mercy (Pittsburgh)
  • Cooperative Power Plant (Reading)
  • Coplay Cement Manufacturing Company (Allentown)
  • Coplay Cement Manufacturing Company (Coplay)
  • Corbits, Inc. (Birdsboro)
  • Corn and Corn (Philadelphia)
  • Corning Glass (Bellefonte)
  • Corning Glass (Chambersburg)
  • Corning Glass Company (State College)
  • Corning Glass Plant (Pittsburgh)
  • Corning Glass Works (Bradford)
  • Cornwall Iron Company (Cornwall)
  • Cornwall Ore Bank Company (Cornwall)
  • Coronada Apartments (Pittsburgh)
  • Corrigan Mckinney and Company (Sharpsville)
  • Country Dry Wall (Williamsport)
  • Cowanshannock C. and C. Company (Punxsutawney)
  • Cramp School (Philadelphia)
  • Cramps Shipbuilding Company (Philadelphia)
  • Crane Company (Johnstown)
  • Crane Company (Verona)
  • Crane Iron Works (Catasauqua)
  • Crane Supply Company (Pittsburgh)
  • Crescent Forgings Company (Pittsburgh)
  • Crescent Iron (Philadelphia)
  • Crescent Works (Pittsburgh)
  • Cresmer Fence Company (Exton)
  • Croft and Allen Company (Philadelphia)
  • Cross Brothers Meat Packing (Philadelphia)
  • Crown, Cork and Seal (Philadelphia)
  • Crown Cork & Seal (Philadelphia)
  • Crown Paperboard Company (Philadelphia)
  • Crown Products (Philadelphia)
  • Crozier Medical Center (Chester)
  • Crucible Steel (Aliquippa)
  • Crucible Steel Company of America (Clairton)
  • Crucible Steel Company of America (Midland)
  • Crucible Steel Company of America (Pittsburgh)
  • Crump, Inc. (Shippingport)
  • Crystal Ice Company (Allegheny City)
  • Csx (Philadelphia)
  • Cudahy Packing Company (Philadelphia)
  • Culp Industrial Insulation Company (Kingston)
  • Culp Industrial Insulation Company (Lock Haven)
  • Cumberland Lt Ht and Pr Company (Bridgeport)
  • Cumberland Valley Railroad Company (Chambersburg)
  • Curry H R Company Inc (Pittsburgh)
  • Curtin Elementary School (Altoona)
  • Curtis-Wright Corporation Propeller Division (Beaver)
  • Curtis Publishing Company (Philadelphia)
  • Custom Insulation Company (York)
  • Cyclops Corporation (Titusville)
  • Cytemp Specialty Steel (Titusville)
D
  • D.L. and W. Railroad Company (Plymouth)
  • D.L. and W. Railroad Company (Scranton)
  • D.L. and W. Railway Company (Nanticoke)
  • D. L. and W Railroad Company (Kingston)
  • D. L. Clark Company (Allegheny)
  • D.O.E. (Bruceton)
  • D.S. Keith Junior High School (Altoona)
  • Dager and Cox Eureka Paper Mills (Bridgeport)
  • Dail Rock Coal Company (Wyoming)
  • Dally Engineering Valve C (Pittsburgh)
  • Damascus Nickel Steel Company (Carnegie)
  • Dana Corporation (Reading)
  • Daniel J. Keating (Philadelphia)
  • Danville Powerhouse (Washingtonville)
  • Danville State Hospital (Danville)
  • Danville Stove and Manufacturing Company (Danville)
  • Danville Structural Tubing Company (Danville)
  • Danville Water Works (Danville)
  • Daring Paper Company (Bridgeport)
  • Darlington Building (Philadelphia)
  • Daugherty Refinery (Petrolia)
  • Dauphin County Prison (Harrisburg)
  • Davison Coke and Iron Company (Neville Island [Neville Township])
  • Day & Zimmerman (Coatesville)
  • Days Inn (Bristol)
  • D B Fuller (Philadelphia)
  • Decorating & Display Studio (Lancaster)
  • Defense Plant Corp (Philadelphia)
  • Defense Supply Agency (Philadelphia)
  • Delancy School (Philadelphia)
  • Delaware, Lackawanna and Western Railroad Company (Nanticoke)
  • Delaware, Lackawanna and Western Railroad Company (Scranton)
  • Delaware Alloy Forge (Philadelphia)
  • Delaware and Hudson Canal Company (Wilkes Barre)
  • Delaware and Hudson Coal Handling Plant (Carbondale)
  • Delaware and Hudson Company (Carbondale)
  • Delaware and Hudson Company (Olyphant)
  • Delaware and Hudson Company (Scranton)
  • Delaware and Magnetic Spgs. Railway Company (Pittsburgh)
  • Delaware County Electric Company (Chester)
  • Delaware Lackawanna and Western Rr Company Diamond Mines (Seranton)
  • Delaware River Cordage Mill (Philadelphia)
  • Delaware River Steel Company (Chester)
  • Delaware Station (Philadelphia)
  • Delaware Storage and Freezing Company (Philadelphia)
  • Delaware Waterside Station (Philadelphia)
  • Deleware, Lackawanna and Western Railroad Company (Plymouth)
  • Delta Equipment Company (Philadelphia)
  • Delworth Paper Company (New Castle)
  • Demoin Steel (Pittsburgh)
  • Department of Motor Vehicles Building (Harrisburg)
  • Department of Safety (Philadelphia)
  • Department of The Interiro Bureau of Mines (Pittsburgh)
  • Dequesna Light Company (Pittsburgh)
  • Desuperheater Station (McKees Rocks)
  • Detroit Steel Products Company (Erie)
  • Deval Corporation (Philadelphia)
  • Dewitt P. Henry Company (Philadelphia)
  • De Witt P Henry Company (Philadelphia)
  • Dexter Portland Cement Company (Nazareth)
  • Diamond Alkali Company (Pittsburgh)
  • Diamond Drill Machine Company (Birdsboro)
  • Diamond Mines (Scranton)
  • Diamond National Bank Building. (Pittsburgh)
  • Dickson Mine Green Ridge Station (Scranton)
  • Didier Station (Bethlehem)
  • Dietz Trucking Company (Pittsburgh)
  • Dill and Collins Company (Philadelphia)
  • Dilworth Porter and Company Ltd. (Pittsburgh)
  • Dilworth Porter Company (Pittsburgh)
  • Dispatch Publishing Company (Pittsburgh)
  • Diversitech General (Jeanette)
  • Dixie Cup Plant (Easton)
  • Dl Molden and Bro. (Philadelphia)
  • D Lutz and Son Brewing Company (Allegheny)
  • D Lutz Son Brewing Company (Allegheny City)
  • Dm Bare Paper Company (Roaring Springs)
  • D M Trahan Proj Supt (Homer City)
  • Dock St. Plant (Easton)
  • Dodge Mines (Scranton)
  • Dodge Steel Company (Philadelphia)
  • Dodson Mines Plymouth Coal Company (Plymouth)
  • D Oher Engr. Company (Philadelphia)
  • Dohler – Jurvis Division (Pottstown)
  • Dolph Coal Company (Dunmon)
  • Dolph Coal Company (Scranton)
  • Domino Sugar Refinery (Philadelphia)
  • Donahue & Weber Construction Company (Philadelphia)
  • Donora Brewing Company (Donora)
  • Donora Zinc Works (Donora)
  • Donovan Cement (Philadelphia)
  • Donovan Company (Philadelphia)
  • Dorchester Apartments (Plymouth Meeting)
  • Dorr Oliver Inc (Spring Grove)
  • Double Woven Corporation of America (Dunmore)
  • Dougherty Bachran (Philadelphia)
  • Downey Center Mayview State Hospital (Bridgeville)
  • Downtown Station (Pittsburgh)
  • Dowty Corporation (Zelienople)
  • Doyle and Company (Philadelphia)
  • Doylestown and Willow Grove Railway Company (Philadelphia)
  • Drake Hotel (Philadelphia)
  • Dravo Contracting Company (Pittsburgh)
  • Dravo Corp (Neville Island [Neville Township])
  • Dravo Corp (Philadelphia)
  • Dravo Corp (Pittsburgh)
  • Dravo Corporation (New Brighton)
  • Dravo Doyle Company (Pittsburgh)
  • Dravo Shipbuilding (Neville Island [Neville Township])
  • Dravo Shipbuilding (Pittsburgh)
  • Dredge Philadelphia (Chester)
  • Dresser Manufacturing Division (Bradford)
  • Drexel Institute (Philadelphia)
  • Drexel University (Philadelphia)
  • Driggs Sealury Ordnance Corp (Sharon)
  • Driggs Seaway Ordnance Corp (Sharon)
  • D R Lane (Pittsburgh)
  • Dr W A Drysdale (Philadelphia)
  • Dubois Elect and Tractn Company (DuBois)
  • Dubois Hospital (DuBois)
  • Duff Norton Manufacturing Company (Pittsburgh)
  • Duggan & Marcon, Incorporated (Allentown)
  • Duguesna Light Company (Pittsburgh)
  • Dunder Mifflin Paper Company (Scranton)
  • Dunmon Iron and Steel Company (Dunmon)
  • Duplan Corporation (Hazleton)
  • Duplan Silk Corp (Hazleton)
  • Dupont Chemical (Philadelphia)
  • Dupont De Nemours Company Ei (Philadelphia)
  • Duquesne Brewing Company (McKees Rocks)
  • Duquesne Brewing Company (Pittsburgh)
  • Duquesne Forge Company (Pittsburgh)
  • Duquesne Forge Company (Rankin)
  • Duquesne Ice Company (Pittsburgh)
  • Duquesne Incinerator (Duquesne)
  • Duquesne Light Company (Cheswick)
  • Duquesne Light Company (Cheswick)
  • Duquesne Light Company (Elrama)
  • Duquesne Light Company (Pittsburgh)
  • Duquesne Light Company (Rankin)
  • Duquesne Light Company (Shippingport)
  • Duquesne Light Company (South Heights)
  • Duquesne Station (Pittsburgh)
  • Duquesne Steel Works (Duquesne)
  • Duraloy Company (Scottdale)
  • Durham Public School (Philadelphia)
  • D’Olier Engineering Company (Philadelphia)
E
  • E & G Brooke Plant (Birdsboro)
  • E. B. Leaf Company (Philadelphia)
  • E. F. Houghton and Company (Philadelphia)
  • E.I. Du Pont De Nemours & Company (Philadelphia)
  • E. I. Dupont Denemours & Company (Philadelphia)
  • E.I. Du Pont De Nemours and Company (Hazleton)
  • E.L. Weigland (Pittsburgh)
  • E.N. Hyde Heating Company (Pittsburgh)
  • E. T. Stotesbury Residence (Philadelphia)
  • Earbeu Harding and Company (Philadelphia)
  • East Boston Colliery (Kingston)
  • East End Electric Light Company (Pittsburgh)
  • East End Light Company (Pittsburgh)
  • Eastern Affiliated Services Corp (Easton)
  • Eastern Asphalt Company (Philadelphia)
  • Eastern Foundry Company (Boyertown)
  • Eastern Hydraulic Press Brick Company (Philadelphia)
  • Eastern Industrial Insulation (Allentown)
  • Eastern Industrial Insulation (Reading)
  • Eastern Penna Railways Company (Pottsville)
  • Eastern Penn Psychiatric Inst (Philadelphia)
  • Eastern Pennsylvania Power Company (Easton)
  • Eastern Steel Company (Pottsville)
  • East Hempfield Elementary School (Greensburg)
  • East Liberty Market (Pittsburgh)
  • Easton Gas and Electric Company (Easton)
  • Easton High School (Easton)
  • Easton Shopping Center (Easton)
  • East Penn Refractories Company (Reading)
  • East Senior High School (West Chester)
  • Eaton Corp (Beaver)
  • Eaton Corporation (Philadelphia)
  • E Bergendahl (Philadelphia)
  • E C Knight and Company (Philadelphia)
  • Econolodge (Levittown)
  • Eddystone Manufacturing Company (Eddystone)
  • Eddystone Powerhouse (Eddystone)
  • Eddystone Station (Eddystone)
  • Edgar Thompson Works (Braddock)
  • Edgar Thompson Works (Pittsburgh)
  • Edgewater Steel Company (Pittsburgh)
  • Edgewater Steel Company (Verona)
  • Edgewood Mill (Shamokin)
  • Edison and Illuminating Company (Hazleton)
  • Edison and Illuminating Company (Mount Carmel)
  • Edison Electric Illg Company (Shamokin)
  • Edison Electric Illmg. Company (West Chester)
  • Edison Electric Illuminating Company (Altoona)
  • Edison Electric Illuminating Company (Bellefonte)
  • Edison Electric Illuminating Company (Lancaster)
  • Edison Electric Illum\’G Company (West Chester)
  • Edison Electric Ill\’G Company (Sunbury)
  • Edison Electric Light Company (Philadelphia)
  • Edison Electric Light Company (York)
  • Edison International (Homer City)
  • Edison Light and Power Company (York)
  • Edison Light Company (Middletown)
  • Edison Mission Energy (Homer City)
  • Edith Furnace (Allegheny)
  • Edw. Harrington Son and Company (Philadelphia)
  • Edward Fay and Son (Philadelphia)
  • Edward G. Budd Manufacturing Company (Philadelphia)
  • Ehret Magnesia Manufacturing Company (Port Kennedy)
  • Einstein Medical Center (Philadelphia)
  • Eisenhower Apartments (Reading)
  • E J Lavino and Company (Philadelphia)
  • E J Lavino and Company (Plymouth Meeting)
  • Electralloy Corp (Oil City)
  • Electric Auto-Lite Company (Hazleton)
  • Electric Company of America Land Title Building (Philadelphia)
  • Electricians Union – Local 98 (I.B.E.W.) (Philadelphia)
  • Electric Power Station (Nanticoke)
  • Electric Storage Battery Company (Philadelphia)
  • Electric Traction Company (Philadelphia)
  • Eleventh Ward School (Allegheny)
  • E Liberty Home Dressed Meat Company (Pittsburgh)
  • Elizabeth Steel Magee Hospital (Pittsburgh)
  • Eliza Furnace Plant (Pittsburgh)
  • Eliza Pipe Shop (McKees Rocks)
  • Elliot Steel Company (Jeanette)
  • Elliott Turbomachinery Company Inc (Jeanette)
  • Ellis School (Pittsburgh)
  • Ellwood City Forge Corp (Ellwood City)
  • Ellwood Elementary (Philadelphia)
  • Elrama Powerhouse (Elrama)
  • Elrama Power Plant (Pittsburgh)
  • Elrama Station (Elrama)
  • E L Rothschild Building (Philadelphia)
  • E M and W Ferguson (Pittsburgh)
  • Empire Building (Pittsburgh)
  • Empire Iron Steel Company (Catasauqua)
  • Empire Mills (Philadelphia)
  • Empire Reeves Steel Company (Pittsburgh)
  • Empire Steel Products (Temple)
  • Employment Security Office (Chester)
  • Enamel Products & Plating Company (McKeesport)
  • Engr Annex (Pittsburgh)
  • Eng Research Bld 19 (York)
  • Enterprise Galvanizing (Philadelphia)
  • Enterprise Transit Company (Titusville)
  • Episcopal Hospital (Philadelphia)
  • Equipment Engineering Company (Pittsburgh)
  • Equitable Gas Company (Elrama)
  • Equitable Gas Energy Company (Pittsburgh)
  • Equitable Gas Steam Heating Company (Pittsburgh)
  • Equitable Ill Gas Light Company (Philadelphia)
  • Equitable Life Assurance Society (Pittsburgh)
  • Erben, Harding and Company (Philadelphia)
  • Erben Harding Company (Tacony)
  • Eric City Iron Works (Erie)
  • Eric Forge & Steel (Erie)
  • Erie Coke Company (Erie)
  • Erie County Electric Company (Erie)
  • Erie Electric Motor Company of Erie Pa. (Erie)
  • Erie Forge and Steel Company (Erie)
  • Erie Lackawanna Railroad (Kingston)
  • Erie Lighting Company (Erie)
  • Erie Malebus Iron (Erie)
  • Erie Railroad (Meadville)
  • Erie Railroad Company (Dunmore)
  • Erie Works (Erie)
  • Erwin Plumbing (Philadelphia)
  • Es Magee Hospital (Pittsburgh)
  • Esso Standard Oil Company (Pittsburgh)
  • Estate of Henry W. Oliver (Pittsburgh)
  • Estate of Stephen Greene (Philadelphia)
  • Estate of Wm. Weightman (Philadelphia)
  • Est of James Lord Jr. (Philadelphia)
  • E T Edwards (Columbia)
  • Eureka (Kingston)
  • Eureka Colliery North 35 (Windber)
  • Eureka Limestone (Philadelphia)
  • Eureka Specialty Company (Scranton)
  • Evans Colliery Company (Hazleton)
  • Evans Memorial (Philadelphia)
  • Everets and Overdeer (Lancaster)
  • E W Bliss Company (Midland)
  • Ewen Breaker (Pittston)
  • Excelsior Steam Planning Mill (Mauch Chunk)
  • Exchange Building (Philadelphia)
  • Exelon Generation Company (Philadelphia)
  • Exelon Generation Company (Phoenixville)
  • Exelon Power (Eddystone)
  • Exelon Power (Phoenixville)
  • Exeter Colliery (Pittston)
  • Exeter Machine Works (Pittston)
  • Exeter Power Company (Pittston)
  • Exide Battery Company (Philadelphia)
  • Exton Mall (Exton)
F
  • F.A. Pavlick (Fairless Hills)
  • F. C. Roberts and Company (Philadelphia)
  • F.F. Geisler and Company (Pittsburgh)
  • F.G. Vogt and Sons (Philadelphia)
  • F.H. Kalbfleisch (Erie)
  • F. R. Dravo and Company (Pittsburgh)
  • F.W Darlington C.E. (Philadelphia)
  • Fabricating Engineering Company (York)
  • Fairhill Apartments (Philadelphia)
  • Fairless Hills Steel Mill (Morrisville)
  • Fairless Steel (Fairless Hills)
  • Fairless Works (Fairless Hills)
  • Fairless Works (Morrisville)
  • Fairless Works Us Steel (Fairless)
  • Fairmoint Wooster Mills (Philadelphia)
  • Fairmount Construction Company (Philadelphia)
  • Fairmount Park Commission (Philadelphia)
  • Fairmount Park Transportation Company (Philadelphia)
  • Fanny Farmers Candy Manufacturing (Harrisburg)
  • F A Poth and Sons (Philadelphia)
  • F A Poth Brewing Company (Philadelphia)
  • Farmers Deposit National Bank Building (Pittsburgh)
  • Farm Show Building (Harrisburg)
  • Farrell Steel Works and Furnaces (Farrell)
  • Fawcus Machine Company (Ford City)
  • Fayette Cty (Newell)
  • Fayette Manufacturing Company (Chester)
  • Fayette R. Plumb Company (Philadelphia)
  • F C Roberts and Company Engineers (Philadelphia)
  • Federal Container Company (Philadelphia)
  • Federal Enameling and Stamping Company (McKees Rocks)
  • Federal Office Building (Philadelphia)
  • Federal Office Building (Pittsburgh)
  • Federal Paper Board Company Inc. (Reading)
  • Federal Savings Bank (Ardmore)
  • Federal Steel Foundry Company (Chester)
  • Feita Corporation (Philadelphia)
  • Felins Meat Packing (Philadelphia)
  • Fels & Company (Philadelphia)
  • Fels Naptha Soap Company (Philadelphia)
  • Fels Soap Company (Philadelphia)
  • Ferrows Chemical Company (Pittsburgh)
  • Fiancisco Sugar Company (Philadelphia)
  • Fidelity Bank Building (Philadelphia)
  • Fidelity Insurance Trust and Safe Deposit Company (Philadelphia)
  • Fidelity Mutual Life Association (Philadelphia)
  • Fidelity Mutual Life Insurance Company (Philadelphia)
  • Finance Building Capitol Complex (Harrisburg)
  • Finnaren & Haley Paint (Conshohocken)
  • Fire Department Repair Shop (Philadelphia)
  • Firestone Plastics Plant (Pottstown)
  • Firestone Rubber Company (Philadelphia)
  • Firestone Tire & Rubber (Pottstown)
  • Firestone Tire Company (Pottstown)
  • First Energy Nuclear Operatin (Shippingport)
  • First Federal Savings & Loan (Sharon)
  • First National Bank (Allentown)
  • First National Bank Building (Pittsburgh)
  • First Pennsylvania Banking & Trust (Philadelphia)
  • First Presbyterian Church (Morrisville)
  • First Presbyterian Church (Sharon)
  • Firth Sterling Inc (McKeesport)
  • Firth Sterling Inc. (McKeesport)
  • Firth Sterling Steel Company (McKeesport)
  • Firth Sterling Steel Company (McKeesport)
  • Fitzpatrick Sheetmetal (DuBois)
  • Fitzsimmons Junior High School (Philadelphia)
  • Flagg, Stanley G. & Company (Pottstown)
  • Flaunery Bolt Company (Bridgeville)
  • Fleischer Mills (Philadelphia)
  • Floor Plant Building 500 (Lancaster)
  • FMC Corp American Viscose Div (Meadville)
  • F Miller Spring & Manufacturing Company (Pittsburgh)
  • Fogelsville Plant (Allentown)
  • Follansbee Brothers Company (Pittsburgh)
  • Folwell Bros. & John Bromley Sons (Philadelphia)
  • Food Distribution Center (Philadelphia)
  • Food Fair Stores (Philadelphia)
  • Foote Mineral Company (Exton)
  • Forbes Steel Company (Canonsburg)
  • Ford and Kendig Company (Conshohocken)
  • Ford City Foundry and Machine Company (Ford City)
  • Ford Motor Company (Chester)
  • Ford Motor Company (Pittsburgh)
  • Forged Steel Wheel Company (Butler)
  • Forrest Laundry (Philadelphia)
  • For Scrap (Philadelphia)
  • Fort Indiantown Gap Military Reservation (Annville)
  • Fort Mifflin (Philadelphia)
  • Fort Pitt Brewing Company (Sharpsburg)
  • Fort Pitt Hotel (Pittsburgh)
  • Fort Pitt Hotel (Pittsburgh)
  • Fort Pitt Malleable and Grey Iron Company (McKees Rocks)
  • Fort Pitt Malleable Iron Company (McKees Rocks)
  • Fort Pitt Steel Casting Company (McKeesport)
  • Fort Pitt Supply Company (Pittsburgh)
  • Founders Hall (Hershey)
  • Four States Coal Coke Company (Pittsburgh)
  • Fox Run Apartments (Philadelphia)
  • Francis Brothers and Jellett Inc. (Philadelphia)
  • Francisco Sugar Company (Philadelphia)
  • Frank & Sedar Dept. Store (Philadelphia)
  • Frankford Arsenal Bureau of Ordinance (Philadelphia)
  • Frankford Hospital (Philadelphia)
  • Frankford Junction (Philadelphia)
  • Frankford Metal Treating (Philadelphia)
  • Frankfurt Plant (Philadelphia)
  • Frank Kneeland Machinery Company (Pittsburgh)
  • Franklin Mint (Philadelphia)
  • Franklin Motel (Philadelphia)
  • Franklin Quality Refining Company (Franklin)
  • Franklin Smelting & Refining (Philadelphia)
  • Franklin Steel Works (Franklin)
  • Franklin Sugar Company (Philadelphia)
  • Franklin Sugar Refining Company (Philadelphia)
  • Franklin Works (Johnstown)
  • Frantz Heating & Roof Company (Reading)
  • Frederick A. Poth (Philadelphia)
  • Freebrook Corporation (Kittanning)
  • Freedom H.S. (Bethlehem)
  • Freight Pitcalm Pittsburgh (Philadelphia)
  • Freihofer Baking Company (Philadelphia)
  • Freihofer Vienna Baking Company (Philadelphia)
  • Frick Building (Pittsburgh)
  • Friskies Pet Care Company Inc (Allentown)
  • Frog Switch Manufacturing Company (Carlisle)
  • F W Tunnell Glue Manufacturing (Philadelphia)
G
  • G.A.F. Corp Industrial Prod Div (Erie)
  • G. E. Industrial Tube Plant (Scranton)
  • G. Garrett & Sons (Philadelphia)
  • G.K. Garrett Company (Philadelphia)
  • G. W. Blabon Company (Philadelphia)
  • Gaf Corporation (Philadelphia)
  • Gage Company (Titusville)
  • Gair Box (Philadelphia)
  • Gallery Chemical Corporation (Callery)
  • Garfield Junior High School (Johnstown)
  • Garland Brothers (Pittsburgh)
  • Garrick Theatre (Philadelphia)
  • Gateway Center Building (Pittsburgh)
  • Gautier Steel Department (Johnstown)
  • Gaylord Colliery (Plymouth)
  • G B Markle and Company (Jeddo)
  • G B Markle Company (Jeddo)
  • Gem Manufacturing Company (Pittsburgh)
  • Gen Engineering Works Inc (Philadelphia)
  • General American Transportation Corp (Sharon)
  • General Chemcial Company (Marcus Hook)
  • General Chemical Company (Newell)
  • General Dynamics Corp (Philadelphia)
  • General Electric (Courtney)
  • General Electric (Harrisburg)
  • General Electric (Pittsburgh)
  • General Electric Company (Allentown)
  • General Electric Company (Bridgeville)
  • General Electric Company (Erie)
  • General Electric Company (King of Prussia)
  • General Electric Company (New Kensington)
  • General Electric Company (Philadelphia)
  • General Engineering Works (Philadelphia)
  • General Ionics Corporation (Bridgeville)
  • General Motors Corporation (Pittsburgh)
  • General Refr Corp (Philadelphia)
  • General Smelting & Refining (Philadelphia)
  • General Steel Castings Company (Eddystone)
  • General Textile Mills (Philadelphia)
  • General Tire & Rubber Company (Jeanette)
  • Geneva College (Beaver Falls)
  • Gene\’s Garage (Philadelphia)
  • Gen Smelting & Ref Company (Philadelphia)
  • Gentex Corp (Carbondale)
  • General Chemical Company of Pennsylvania (Pittsburgh)
  • Geo. F. Uber Company (Philadelphia)
  • Geo. H. Walbridge Lackawanna Light Company (Scranton)
  • Geo. M. Newhall Engineering Company (Philadelphia)
  • Geo. S. Harris and Sons (Philadelphia)
  • Geo. W. Blabon Company (Nicetown)
  • Geo A Smith and Company (Philadelphia)
  • Geo K Garrett Company Inc (Philadelphia)
  • Geo M Newhall Eng and Company (Philadelphia)
  • George A. Fuller Contracting Company (Philadelphia)
  • George Hasley and Sons (Allegheny)
  • George K Garrett Company Inc M (Philadelphia)
  • George Sall Metals Company (Philadelphia)
  • George Singleton (Scranton)
  • George V. Hamilton, Inc. (McKees Rocks)
  • Georgia Pacific Pulp & Paper (Reading)
  • Geo Westinghouse Jr. (Pittsburgh)
  • Gerard Trust Building (Philadelphia)
  • German Hospital (Philadelphia)
  • Germantown District High School (Philadelphia)
  • Germantown Hospital (Philadelphia)
  • Germantown Jct (Philadelphia)
  • Germantown Jewish Center (Philadelphia)
  • Germantown Ymca (Philadelphia)
  • Gibson and Sons, Ins. (Philadelphia)
  • Gilbert Associates, Inc. (Reading)
  • Gimbels Store (Philadelphia)
  • Gipsey Grove Colliery (Dunmore)
  • Girard Coal Company (Mount Carmel)
  • Girard Coal Company (Pittston)
  • Girard College (Philadelphia)
  • Girard Estate Peoples Bank (Philadelphia)
  • Girard Gollege (Philadelphia)
  • Girard Point Lpg Recv & Caustic Reg (Philadelphia)
  • Girard Refinery (Philadelphia)
  • Girard Trust Company (Philadelphia)
  • Girls Normal School (Philadelphia)
  • Girrard College (Philadelphia)
  • Glasgow Iron Company (Pottstown)
  • Glatfelter Paper Mill (Spring Grove)
  • Glatfelter P H Company (Spring Grove)
  • Glen Alden Coal Company (Ashley)
  • Glen Alden Coal Company (Nanticoke)
  • Glen Alden Coal Company (Plymouth)
  • Glenalden Coal Company Maxwell Colliery (Scranton)
  • Glen Gery Shale Brick Company (Harrisburg)
  • Glenn M. Baker Heating & Plumbing (Huntingdon)
  • Glen Willow Ice Manufacturing Company Manayunk (Philadelphia)
  • Glenwood Station (Pittsburgh)
  • Globe Automatic Sprinkler System (Philadelphia)
  • Globe Dye Works Company (Philadelphia)
  • Globe Eye Works (Philadelphia)
  • Globe Rubber Company (Philadelphia)
  • Glp Company (Philadelphia)
  • Glyco Chemicals Division (Williamsport)
  • Gold Bond Building Products (Milton)
  • Goldsmith Building (Philadelphia)
  • Goldsteins & Sons Inc (Philadelphia)
  • Goodyear (Pittsburgh)
  • Goodyear Tire and Rubber (Conshohocken)
  • Gordon Strobel and Lawreau (Philadelphia)
  • Governor\’s Mansion (Harrisburg)
  • Graham Foundry and Machine Company (Monongahela)
  • Grantley Rd York Coutny (York)
  • Grant Station (Pittsburgh)
  • Grant Towers (Duquesne)
  • Gratz & Gillespie School (Philadelphia)
  • Grays Ferry Cogeneration Part (Philadelphia)
  • Grays Ferry Road and Carpenter St. (Philadelphia)
  • Greater Pittsburgh Airport (Pittsburgh)
  • Great Lakes Steel (Pittsburgh)
  • Green Bag Cement (Neville Island [Neville Township])
  • Green Ridge Coal Company (Scranton)
  • Green Spring Company (Philadelphia)
  • Greenville Steel Car Company (Greenville)
  • Greyhound Bus Terminal (Philadelphia)
  • Grinnell Company Inc (Columbia)
  • Grocer\’s Sugar House (Philadelphia)
  • Grosglass (Beaver Falls)
  • Grover Cleveland Public School (Philadelphia)
  • Gsa (Harrisburg)
  • Guardian Encr & Dev Company (Carnegie)
  • Gulf Oil Corporation (Girard Point)
  • Gulf Oil Corporation (Philadelphia)
  • Gulf Oil Corporation (Pittsburgh)
  • Gulf Oil Corporation (Pittsburgh)
  • Gulf Oil Refinery (Pittsburgh)
  • Gulf Refinery (Philadelphia)
  • Gulf Refining Company (Girard Point)
  • Gulf Refining Company (Neville Island [Neville Township])
  • Gulf Refining Company (Philadelphia)
  • Gulf Refining Company (Pittsburgh)
  • Gulf Research & Development (Cheswick)
  • Gulf Research & Development (Harmarville)
  • Gulf Research & Development (Pittsburgh)
  • Gun Plant (Philadelphia)
  • G W Allen and Company (Philadelphia)
  • G W Childs Public Ledger Building (Philadelphia)
  • G W Johnson Company (New Castle)
H
  • H. C. Finch Coke Company (Pittsburgh)
  • H.C. Price Company (Philadelphia)
  • H. C. Trick Coke Company (Pittsburgh)
  • H.D. Justi Division (Philadelphia)
  • H. Daroff and Sons (Philadelphia)
  • H.H. Chrowder Company (Allentown)
  • H. H. Heinz Lab. (Pittsburgh)
  • H.H. Robertson Company (Ambridge)
  • H.H. Robertson Company (Pittsburgh)
  • H. J. Heinz and Company (Allegheny)
  • H.J. Heinz Company (Chambersburg)
  • H. J. Heinz Company (Pittsburgh)
  • H. Julius Klingler and Company (Butler)
  • H.K. Crimming Tradesman Grain Elevator and Storage Company (Philadelphia)
  • H.K. Horter and Company (Pittsburgh)
  • H.K. Porter (Pittsburgh)
  • H. Koppers Company (New Castle)
  • H. Koppers Company (Pittsburgh)
  • H.L. Edwards and Company (Philadelphia)
  • H. L. Frick Coke Company (Pittsburgh)
  • H.R. Curry (Sharpsburg)
  • H.T.Watson Company (Erie)
  • H. W. Butterworth and Sons (Philadelphia)
  • Hafleigh and Company (Philadelphia)
  • Hahnemann Hospital (Philadelphia)
  • Hainsworth Steel Company (Pittsburgh)
  • Hajoca Building (Philadelphia)
  • Hale Building (Philadelphia)
  • Hall and Garrison (Philadelphia)
  • Haltenback and Stephens (Allentown)
  • Hamilton Watch Company (Lancaster)
  • Hammermill Paper (Lock Haven)
  • Hammermill Paper Company (Erie)
  • Hamot Hospital (Erie)
  • Hamot Medical Center (Erie)
  • Hampton Boiler Plant (Scranton)
  • Hampton Mines (Scranton)
  • Handy & Harman Tube Company (Norristown)
  • Hanover Power Company (Hanover)
  • Happenstall Company (Pittsburgh)
  • Harbison-Walker Refractories Company (Pittsburgh)
  • Harbison and Walker Company (Woodland)
  • Harbison Walker Refractories Company (Pittsburgh)
  • Harbson Walker Company (Pittsburgh)
  • Harcum Junior College (Bryn Mawr)
  • Hardesty Industries (Philadelphia)
  • Harding Ave. Jr. High School (Aliquippa)
  • Hardinge Company (York)
  • Hardware & Industrial Tool (Philadelphia)
  • Hardwick and Magee Company (Philadelphia)
  • Harleigh Brookwood Coal Company (Pottsville)
  • Harmar Coal (Harmarville)
  • Harrisburg Foundry and Mach Company (Easton)
  • Harrisburgh Light and Power Company (Harrisburg)
  • Harrisburg Hospital (Harrisburg)
  • Harrisburgh Water Works (Harrisburg)
  • Harrisburg Light and Power Company (Harrisburg)
  • Harrisburg State Hospital (Harrisburg)
  • Harrisburg Station (Philadelphia)
  • Harrisburg Steel (Harrisburg)
  • Harrison, Havemeyer and Company Franklin Refinery (Philadelphia)
  • Harrison Brothers (Philadelphia)
  • Harrison Building (Philadelphia)
  • Harrison Frazier and Company (Philadelphia)
  • Harry Roman (Pittsburgh)
  • Harshaw, Fuller, and Goodwin (Philadelphia)
  • Hartman Steel Company (Beaver Falls)
  • Hatfield Power Station (Masontown)
  • Hatfield Power Station (Monongahela)
  • Hatfield Power Station On West Bank (Monongahela)
  • Hatfields Ferry Power Station (Greensburg)
  • Hatfield Station (Masontown)
  • Hays Army Depot (Pittsburgh)
  • Hazard Manufacturing Company (Wilkes Barre)
  • Hazel Atlas Glass Company (Washington)
  • Hazelton Water Works. (Hazleton)
  • Hazelwood Byproducts (Pittsburgh)
  • Hazelwood Plt (Pittsburgh)
  • Hazleton Brick Company (Hazleton)
  • Hazleton Electric Light and Power Company (Hazleton)
  • HBG (Enola)
  • Heeren Brothers and Company (Pittsburgh)
  • Heintz Div of Kelsey Hayes Company (Philadelphia)
  • Heintz Manufacturing Company (Philadelphia)
  • Heinz, H.J. Company (Pittsburgh)
  • Heinz H J Company (Pittsburgh)
  • Heinz U.S.A. (Pittsburgh)
  • Helfenstein, Lewis and Green (Philadelphia)
  • Hendel Hat Company (Reading)
  • Henderson Sugar Refinery (Philadelphia)
  • Hendrick Manufacturing Company (Carbondale)
  • Henry Colliery (Wilkes Barre)
  • Henry Laudenslager (Harrisburg)
  • Henry Phipps Central Power Plant (Pittsburgh)
  • Henry Phipps Mutual Training School (Allegheny)
  • Heppenstall Eddystone Corp (Eddystone)
  • Heppenstall Forge and Knife Company (Pittsburgh)
  • Heppenstall Forge Eddystone Company (Eddystone)
  • Heppenstall of Pittsburgh (Pittsburgh)
  • Hercules Powder Company (Philadelphia)
  • Herman Goldner Company (Philadelphia)
  • Herris Island (Pittsburgh)
  • Herron Hill Pumping Station (Pittsburgh)
  • Hershey Chocolate Corporation (Hershey)
  • Hershey Foods Corporation (Hershey)
  • Hershey Medical Center/Hospital (Hershey)
  • Hershey State Police Training Barri (Hershey)
  • Hess Brothers Warehouse (Allentown)
  • Hess Department Store (Lancaster)
  • Hess Inc (Scranton)
  • Heston High School (Philadelphia)
  • Hestonville Mantua and Fairmount Passenger RailroadCompany (Philadelphia)
  • Hetrick and Wilson (Indiana)
  • Heyl and Patterson Inc (Pittsburgh)
  • H H Curry Company (Pittsburgh)
  • Hickory Ridge Colliery (Shamokin)
  • Hickory Swamp Colliery (Shamokin)
  • Highland Brewing Company (Pittsburgh)
  • Highland North 5 Colliery (Jeddo)
  • Hillside Coal and Iron Company (Pittston)
  • Hilton Hotel (Lancaster)
  • Hilton Hotel (McKees Rocks)
  • Hinckliffe Keener (Pittsburgh)
  • Hiram Swanks Son (Johnstown)
  • H J Heinz and Company (Pittsburgh)
  • H K Cummings (Philadelphia)
  • Hk Porter Company (Pittsburgh)
  • H K Porter Company (Pittsburgh)
  • Hog Island Shipyard (Philadelphia)
  • Holiday Inn (Philadelphia)
  • Hollenback Colliery (Wilkes Barre)
  • Hollidaysburg Power Station (Hollidaysburg)
  • Holy Redeemer Hospital (Philadelphia)
  • Home Electric Light and Steam Heating Company (Tyrone)
  • Homeopathic Hospital (Pittsburgh)
  • Homer City Powerhouse (Homer City)
  • Homestead Highland (Homestead)
  • Homestead Steel Works (Munhall)
  • Homestead Steel Works (Pittsburgh)
  • Homestead Water Works (Homestead)
  • Homestead Works Us Steel (Homestead)
  • Hood, Bonbright and Company (Philadelphia)
  • Hooples and Townsend Company (Fort Washington)
  • Hopeman Borthers (Chester)
  • Hope Natural Gas Company (Pittsburgh)
  • Hopkinson House Apartments (Philadelphia)
  • Hopper Paper Company (Reading)
  • Horlacher Brewing Company (Allentown)
  • Horsehead Industries (Monaca)
  • Host Motel (Lancaster)
  • Hotel Lafayette (Philadelphia)
  • House of Correction (Philadelphia)
  • House of Good Shepard (Reading)
  • House of The Good Shepherd (Philadelphia)
  • Howard Axle Plant (Homestead)
  • Howard Reed (Philadelphia)
  • Howe and Polk (Danville)
  • Howe and Samuel (Danville)
  • Howe Brown and Company (Pittsburgh)
  • Howe Sound Company (Lancaster)
  • Howmet Corporation (Lancaster)
  • Hubbard Tool Div (Pittsburgh)
  • Hudson Coal Company (Carbondale)
  • Hudson Coal Company (Olyphant)
  • Hudson Coal Company (Scranton)
  • Hudwood Irwin Company, Inc. (Huntingdon)
  • Huff Power Station (New Florence)
  • Hughes and Gauthorp Company (Pittsburgh)
  • Hughes and Paterson (Philadelphia)
  • Hugh Mcinnes Rebecca Paper Mill (Bridgeport)
  • Hugus and Hacke (Pittsburgh)
  • Hummelstown Water Supply (Harrisburg)
  • Hunter Manufacturing (Levittown)
  • Hunter Saw & Machine (Lawrenceville)
  • Hunting Park Plant (Philadelphia)
  • Hussey Building (Pittsburgh)
  • Hutchinson St Station (Philadelphia)
  • Hv Charles Company (Philadelphia)
  • H W Oliver\’s Central Power Plant (Pittsburgh)
  • Hyde Park Gas Company (Scranton)
  • Hydro-Blast Corporation (Burnham)
  • Hydro-Blast Corporation (Danville)
  • Hydro-Blast Corporation (Erie)
  • Hydro-Blast Corporation (Franklin)
  • Hydro-Blast Corporation (Philadelphia)
  • Hygeia Ice Company (Philadelphia)
  • Hygrade Food Products (Philadelphia)
  • Hygrade Foods (Philadelphia)
  • Hyman Brodsky & Son (Philadelphia)
I
  • I.T.E. Circuit Breaker Company (Philadelphia)
  • I.T.T. Fluid Products (Lancaster)
  • IBM Building (Philadelphia)
  • IBM Building (Pittsburgh)
  • Illinois Steel Company (Pittsburgh)
  • Illinois Zinc Company (Pittsburgh)
  • Immaculate Conception Cathedral (Philadelphia)
  • Immaculate Conception School (Lock Haven)
  • Imperial Leather Company (Allegheny)
  • Imperial Type Metals (Philadelphia)
  • Independence Hall (Philadelphia)
  • Independent Brewing Company (Allegheny)
  • Independent Brewing Company of Pittsburgh (Pittsburgh)
  • Independent Manufacturing Company (Philadelphia)
  • Indiana Cold Stge and Ice Company (Indiana)
  • Indiana County Railways Company (Punxsutawney)
  • Indiana Erie Company (Indiana)
  • Indiana Provision Company (Indiana)
  • Indiana State Teachers College (Indiana)
  • Industrial Air Conditioning (Philadelphia)
  • Industrial Cold Storage and Warehouse Company (Philadelphia)
  • Industrial Div. Warehouse (Pittsburgh)
  • Industrial Equipment Company (Scranton)
  • Industrial Valley Bank (Philadelphia)
  • Ingersoll Rand Company (Easton)
  • Ingersoll Rand Company (Pittsburgh)
  • Ingersoll Sergeant and Drill Company (Easton)
  • Ingram Richardson Company (Beaver Falls)
  • Inland Container Corp (Philadelphia)
  • Inland Products (Pittsburgh)
  • Inolex Chemical (Philadelphia)
  • Interlake Iron Company (Erie)
  • International Motor Company (Allentown)
  • International Paper Company (Erie)
  • International Paper Company (Lock Haven)
  • International Paper Company (York Haven)
  • International Service Ind. (Scranton)
  • Interstate Railways Company (Philadelphia)
  • Iowa Barbed Wire Company (Allentown)
  • Iron City Heating Company (Pittsburgh)
  • Ironworkers Union (Philadelphia)
  • Iroquois Apartments (Pittsburgh)
  • IRS Building (Philadelphia)
  • Irwin Works (Irwin)
  • Isabella Furnace Company (Etna)
  • Isbrill and Company (Philadelphia)
  • Isimbel Brothers Stable (Philadelphia)
  • Island Petroleum Company (Neville Island [Neville Township])
  • Island Petroleum Company (Pittsburgh)
  • ITE Circuit Breaker Company (Philadelphia)
  • IVB Building (Philadelphia)
  • Ivy Rock Farm (Conshohocken)
J
  • J&L Specialty Steel Corp. (Pittsburgh)
  • J.A. Dougherty’s Sons (Philadelphia)
  • J.B. Lippincott Building (Philadelphia)
  • J. B. Veatch (Aliquippa)
  • J.C. Klauder Estate (Philadelphia)
  • J. C. Mcdowell (Pittsburgh)
  • J.D. Morrissey Inc. (Philadelphia)
  • J. E. Baker Company (York)
  • J.E. Patterson (Wilkes Barre)
  • J.F. Betz and Son (Philadelphia)
  • J. F. Betz and Sons (Philadelphia)
  • J.F. Buchanan and Company (Philadelphia)
  • J. G. Brill and Company (Philadelphia)
  • J.G. Brill Company (Philadelphia)
  • J. H. & C. K. Eagle (Shamokin)
  • J.H. and C.K. Eagle Company (Shamokin)
  • J.J. De Kinder (Philadelphia)
  • J.J. White Company (Marcus Hook)
  • J. Langdon and Company Inc. (Shamokin)
  • J.S. Wentz (Mauch Chunk)
  • J.T. Bennett Company (Philadelphia)
  • J.W. Ivory Company (Philadelphia)
  • J.P. Maloney (Scranton)
  • Jacoby Heating Inc (Harrisburg)
  • James C Morrissey (Philadelphia)
  • James H. Reed Power Station (Pittsburgh)
  • James Irwin and Company (Pittsburgh)
  • James L. Stuart (Pittsburgh)
  • James Lees and Sons Company (Bridgeport)
  • James Martin and Company (Philadelphia)
  • James Mckay Company (McKees Rocks)
  • James P Wood Heating Company (Philadelphia)
  • James Reed Power Street (Pittsburgh)
  • Jamison Coal and Coke Company (Greensburg)
  • Jamison Coal and Coke Company (Pittsburgh)
  • J and R Meily (Lebanon)
  • J and W Yewdall (Philadelphia)
  • Janney Cylinder (Philadelphia)
  • Jas. Bonar and Company (Pittsburgh)
  • Jaunty Fabric Corp (Scranton)
  • Jaunty Silk Company Inc. (Scranton)
  • Jawood Lukens (Conshohocken)
  • Jayval Marine Corporation (Girard Point)
  • Jb Ellison and Sons (Philadelphia)
  • J B Kelly Construction (Philadelphia)
  • J C  Grover & Sons (Philadelphia)
  • J C Graham and Company (Philadelphia)
  • J C Klauder (Philadelphia)
  • J D Fenny Company (Harrisburg)
  • J D Grover & Sons (Philadelphia)
  • Jeannette Glass Company (Jeanette)
  • Jeannette Shade & Novelty Company (Jeanette)
  • Jeddo Highland Coal Company (Jeddo)
  • Jefferson and Clearfield Company (Punxsutawney)
  • Jefferson Hospital (Philadelphia)
  • Jefferson Medical College (Philadelphia)
  • Jenny Cylinder (Philadelphia)
  • JE Patterson and Company (Pittston)
  • J E Potter and Company (Philadelphia)
  • Jere Woodring and Company (Hazleton)
  • Jere Woodring and Company (Hazleton)
  • Jermyn and Company (Pittston)
  • Jersey Cereal Food Company (Irwin)
  • Jesse W Starr Jr. (Philadelphia)
  • Jessop Steel Corp (Washington)
  • Jessop Steel Plant (Washington)
  • Jetronic Industries (Philadelphia)
  • Jewish Home For The Aged (Philadelphia)
  • Jewish Hospital (Philadelphia)
  • J H Michener and Company (Philadelphia)
  • J H Sternbergh and Son (Reading)
  • J H Wilcox (Chester)
  • J K Wright and Company (Philadelphia)
  • J Mundell and Company (Philadelphia)
  • John A Rigg (Philadelphia)
  • J North F. Wilcox (Pittsburgh)
  • Joel J Bailey and Company (Philadelphia)
  • John-David Company (Philadelphia)
  • John A. Rigg (Lebanon)
  • John A. Rigg (Reading)
  • John B. Kelly Construction (Philadelphia)
  • John B. Stetson Company (Philadelphia)
  • John Bartram Senior High School (Philadelphia)
  • John Bistelson Company (Philadelphia)
  • John Bromley and Sons (Philadelphia)
  • John Brown’s Sons (Philadelphia)
  • John Cohen Clothes (Philadelphia)
  • John Dimling (Pittsburgh)
  • John F. Casey, Incorporated (Butler)
  • John J Kane Hospital (Pittsburgh)
  • John Lang Paper Company (Philadelphia)
  • John Moffet Elementary School (Philadelphia)
  • John Mundell and Company (Philadelphia)
  • Johnnys Gas Station (Ambridge)
  • John Potero Company (Philadelphia)
  • Johns-Manville (Pittsburgh)
  • John S. Pepson (Uniontown)
  • Johnson Company (Johnstown)
  • Johnstown Water Authority (Johnstown)
  • John Tack & Sons (Butler)
  • John Tearney Heating & Plumbing (Lancaster)
  • John Veith Colliery (Minersville)
  • John Wanamaker Department Store (Philadelphia)
  • John Wanamaker Store (King of Prussia)
  • John Wood Company (Conshohocken)
  • John Wood Manufacturing Company (Conshohocken)
  • John Yewdall Keystone Mills (Philadelphia)
  • John Zimmermann and Sons (Philadelphia)
  • Jonathan Ring and Son (Philadelphia)
  • Jones & Laughlin Steel (Braddock)
  • Jones & Laughlin Steel (Philadelphia)
  • Jones & Laughlin Steel Corporation (Pittsburgh)
  • Jones and Laughlin Steel Company (Woodland)
  • Jones and Laughlin Steel Corporation (Woodlawn)
  • Jones and Loughlin Steel Corporation (Aliquippa)
  • Jones Junior High School (Philadelphia)
  • Jones Laughlin Steel Company (Woodlawn)
  • Jones Laughlin Steel Corp (Pittsburgh)
  • Joseph Horne and Company (Pittsburgh)
  • Joseph R. Foster Sons (Philadelphia)
  • Joseph S. Finch Company (Pittsburgh)
  • JS and T Elkinton (Philadelphia)
  • Julius Kayser Company Crown Plant (Bangor)
  • Junior High School (Aliquippa)
  • Justi Division W. Gold Ref. (Philadelphia)
  • J W Arrott (Pittsburgh)
  • J W Koch Company (Harrisburg)
  • J W Rex Company (Lansdale)
K
  • K & L Refractory Service (Erie)
  • Kaiser Engineers (Bristol)
  • Kaiser Job (Butler)
  • Kaiser Metal (Bristol)
  • Kane School (Philadelphia)
  • Karl Lieberknecht Inc. (Reading)
  • Karl R.H. Knapp, Incorporated (Pittsburgh)
  • Kaufman Building (Pittsburgh)
  • Kaufmans Department Store (Pittsburgh)
  • Kawecki Chemical Company (Boyertown)
  • Kawecki Chemical Company (Reading)
  • Keasbey and Mattison (Philadelphia)
  • Keasbey and Mattison Company (Ambler)
  • Keebler Biscuits Company (Philadelphia)
  • Keenan Company (Philadelphia)
  • Kelloggs (Lancaster)
  • Kelly and Jones Company (Greensburg)
  • Kelly and Jones Company (Pittsburgh)
  • Kelly and Ludwig (Philadelphia)
  • Kelsey Hayes Wheel Company (McKeesport)
  • Kemmerer Iron and Steel Company (Scranton)
  • Kendall Refining Company (Bradford)
  • Kennametal Inc (Latrobe)
  • Kensington Water Company (New Kensington)
  • Kewecki Berylco Ind Inc (Boyertown)
  • Keystone Asbestos-Magnesia Company (Etna)
  • Keystone Brewers Inc (Pittsburgh)
  • Keystone Coal and Coke Company (Greensburg)
  • Keystone Construction Company (Philadelphia)
  • Keystone Drydock (Philadelphia)
  • Keystone Engineering Company (Pittsburgh)
  • Keystone Generation Station (Elderton)
  • Keystone Pipe and Supply (Butler)
  • Keystone Plantation (Wyoming)
  • Keystone Portland Cement Company (Bath)
  • Keystone Power Plant (Indiana)
  • Keystone Power Station (Shelocta)
  • Keystone Project (Clairton)
  • Keystone Roofing Company (York)
  • Keystone Woolen Mills (Conshohocken)
  • Kibbe, Chaffie and Company (Philadelphia)
  • Kim-Bob Construction (Harrisburg)
  • Kingan and Company Ltd. (Philadelphia)
  • King of Prussia Shopping Center (King of Prussia)
  • Kingston Coal Company (Kingston)
  • Kittanning Brick and Fire Clay Company (Pittsburgh)
  • Kittanning Ceramics Company (Kittanning)
  • Kittanning Plate Glass Company (Kittanning)
  • Knoblit – Richmond Street (Philadelphia)
  • Kolnile Brewing Company (Philadelphia)
  • Koppel Plant (Beaver Falls)
  • Koppel Steel Company (Ambridge)
  • Koppel Steel Company (Beaver Falls)
  • Koppers (Fairless Hills)
  • Koppers (Philadelphia)
  • Koppers Company (McKees Rocks)
  • Koppers Company, Inc. (Beaver)
  • Koppers Company, Inc. (Johnstown)
  • Koppers Company, Inc. (Kobuta)
  • Koppers Company, Inc. (Monaca)
  • Koppers Company, Inc. (Oil City)
  • Koppers Company, Inc. (Pittsburgh)
  • Koppers Company, Inc. (Swedeland)
  • Koppers Company, Inc. (Verona)
  • Koppers Company Inc (Petrolia)
  • Koppers Pittsburgh Company (Bridgeville)
  • Koppers Research Lab (Monroeville)
  • Korvettes Shopping Center (Philadelphia)
L
  • L & R Construction (Philadelphia)
  • L-Air Liquide (Johnstown)
  • L.A. Riley and Company (Philadelphia)
  • L. Goldstein\’s Sons Inc. (Philadelphia)
  • L.H. Parke Company (Philadelphia)
  • L.J. Land Inc (Reading)
  • L.Laveson and Son (Philadelphia)
  • L. Winterer (Philadelphia)
  • La Belle Works (Allegheny)
  • Labor Products and Ice Company (Brackenridge)
  • La Brum School (Philadelphia)
  • Lackanawa I and S Company (Scranton)
  • Lackawanna and Wyoming Valley Railway Company (Scranton)
  • Lackawanna Iron and Coal Company (Scranton)
  • Lackawanna Iron and Steel (Lebanon)
  • Lackawanna Valley Electric Lt and Power Company (Carbondale)
  • Laco-Mcmullen Company Inc. (Erie)
  • Laco Applicators, Inc. (Warren)
  • Laddie Boy Dog Food Compan (Philadelphia)
  • Lafayette College (Easton)
  • Lafayette Hotel (Philadelphia)
  • Lakens Iron and Steel Company (Coatesville)
  • Lancaster Closure Plant (Lancaster)
  • Lancaster Cork Works (Lancaster)
  • Lancaster County Railway and Light Company (Lancaster)
  • Lancaster Floor Plant (Lancaster)
  • Lancaster Mall Castings (Lancaster)
  • Lancaster Malleable Castings Company (Lancaster)
  • Lancaster Water Works (Lancaster)
  • Lance Colliery 11 (Plymouth)
  • Land Title and Trust Company (Philadelphia)
  • Lankenau Hospital (Philadelphia)
  • Lansdale Tube (Lansdale)
  • Latrobe Area Hospital (Latrobe)
  • Latrobe Brewing Company (Latrobe)
  • Latrobe Construction (Latrobe)
  • Latrobe Electric Steel Company (Latrobe)
  • Latrobe Forge & Spring, Inc. (Latrobe)
  • Latrobe Hospital (Latrobe)
  • Latrobe Steel Company (Latrobe)
  • Latrobe Steel Works (Latrobe)
  • Laurel Run Coal Company (Wilkes Barre)
  • Lava Crucible Refractories (Zelienople)
  • Lavino Furnace Company (Lebanon)
  • Lavino Shipping Company (Philadelphia)
  • L C Anderson (Huntingdon)
  • Leader Publishing Company (Pittsburgh)
  • League Island (Philadelphia)
  • Leamy Home Mount Airy (Philadelphia)
  • Lebanon Blast Furnace Company (Lebanon)
  • Lebanon City County Building (Lebanon)
  • Lebanon Concentrator Plant (Lebanon)
  • Lebanon Furnance Company (Lebanon)
  • Lebanon Steam Company (Lebanon)
  • Lebanon Valley College (Annville)
  • Lebanon Valley Iron Works (Lebanon)
  • Lebanon Valley Str. Railway. Company (Lebanon)
  • Leeds & Northrup (Philadelphia)
  • Lee Hospital (Johnstown)
  • Lee Rubber & Tire Company (Conshohocken)
  • Lehigh and Wilkes Barre Coal Company (Ashley)
  • Lehigh and Wilkes Barre Coal Company (Philadelphia)
  • Lehigh and Wilkes Barre Coal Company (Wilkes Barre)
  • Lehigh Car Wheel and Axle Company (Catasauqua)
  • Lehigh Coal and Navigation Company (Philadelphia)
  • Lehigh Coal and Navigation Company (Wilkes Barre)
  • Lehigh Coal Navigation Company (Hauto)
  • Lehigh Coke Company (South Bethlehem)
  • Lehigh County Court House (Allentown)
  • Lehigh Engineering (Bethlehem)
  • Lehigh Engineering Company (Dunmore)
  • Lehigh Engineering Company (Hanover)
  • Lehigh Industrial Power Company (Hauto)
  • Lehigh Manufacturing Company (Philadelphia)
  • Lehigh Material Company (Philadelphia)
  • Lehigh Navigation Electric Company (Hauto)
  • Lehigh Pipe Shop (Bethlehem)
  • Lehigh Portland Cement Company (Allentown)
  • Lehigh Portland Cement Company (Bath)
  • Lehigh Portland Cement Company (New Castle)
  • Lehighs Northampton Gas Electric Company (Catasauqua)
  • Lehigh University (Bethlehem)
  • Lehigh Valley Coal Company (Hazleton)
  • Lehigh Valley Coal Company (Hazleton)
  • Lehigh Valley Coal Company (Mount Carmel)
  • Lehigh Valley Coal Company (Philadelphia)
  • Lehigh Valley Coal Company (Pittston)
  • Lehigh Valley Coal Company (Wilkes Barre)
  • Lehigh Valley Coal Company (Wyoming)
  • Lehigh Valley Cooperative Farmers (Allentown)
  • Lehigh Valley Dairy (Allentown)
  • Lehigh Valley R. R. (Kingston)
  • Lehigh Valley Railroad Company (Bethlehem)
  • Lehigh Valley Traction Company (Allentown)
  • Lehigh Valley Transit Company (Allentown)
  • Lehigh Water Company (Easton)
  • Lehigh Wilkes Barr Coal Company (Philadelphia)
  • Lehigh Wilkesbarre Coal Company (Plymouth)
  • Lehigh Wilkes Barre Coal Company (Wanamie)
  • Lehigh Wilkes Barre Coal Company (Wilkes Barre)
  • Leicester Continental Mills Company (Germantown)
  • Leidy School (Philadelphia)
  • Leisenring and Company (Minersville)
  • Lenape Forge Inc (West Chester)
  • Leonard Brothers (Seranton)
  • Leopold Vilsack (Pittsburgh)
  • Lester Industrial Building (Lester)
  • Leston Company (Philadelphia)
  • Lewis Block (Pittsburgh)
  • Lewis Elkin Elementary (Philadelphia)
  • Lewis Foundry and Mach Company (Pittsburgh)
  • Lewis S. Cox and Company (Philadelphia)
  • Lexington Mead Corporation (Pittsburgh)
  • L H Prentice Company (Pittsburgh)
  • Liberty Bell Race Track (Philadelphia)
  • Liberty Building & Heating (Aliquippa)
  • Liberty Manufacturing Company (Pittsburgh)
  • Liberty Market Company (Pittsburgh)
  • Liggett and Myers Tobacco Company (Philadelphia)
  • Limbach Company (Pittsburgh)
  • Limbach S Pgh Water Company (Elrama)
  • Lincoln Coal and Coke Company (Scottdale)
  • Lincoln H.S. (Ellwood City)
  • Lincoln Liberty Building (Philadelphia)
  • Linde Air Products Company (Coatesville)
  • Linde Air Products Company (Homestead)
  • Linde Air Products Company (Kittanning)
  • Linde Air Products Company (Pittsburgh)
  • Linde Air Proudcts Company (Duquesne)
  • Linde Company (Erie)
  • Linde Company (Farrell)
  • Lindner Shoe Company (Carlisle)
  • Lindner Shoe Company (Philadelphia)
  • Line Company (Braddock)
  • Link Belight Engineering Company (Nicetown)
  • Link Belt Engineering Company (Nicetown)
  • Link Belt Engineering Company (Philadelphia)
  • Liquid Carbonic Acid Manufacturing Company (Pittsburgh)
  • Liquid Carbonic Corp (Philadelphia)
  • Little Sisters of The Poor (Pittsburgh)
  • Lochiel Rolling Mill Company (Harrisburg)
  • Lockhart Iron and Steel Company (McKees Rocks)
  • Logan Iron and Steel Company (Burnham)
  • Longmead Iron Company (Conshohocken)
  • Long Publishing Company (Philadelphia)
  • Longshoremans Union – Local 1291 (Philadelphia)
  • Longstreth Elementary School (Philadelphia)
  • Loos & Dilworth (Philadelphia)
  • Loose Wiles Biscuit Company (Pittsburgh)
  • Lorain Steel Company (Johnstown)
  • Lorenz & Sons (Philadelphia)
  • Lorenz Heat Treating (Philadelphia)
  • Louis B. Orlowitz Plumbing Supply (Philadelphia)
  • Louis Kraemer and Company (Reading)
  • Lovekin Trageser Div (Philadelphia)
  • Lovekin Water Heater Company (Philadelphia)
  • Lovell Manufacturing Company (Erie)
  • Lower Merion High School (Ardmore)
  • Lower Works (Woodland)
  • Ltv Sheet and Tube (Midland)
  • Ltv Steel (Aliquippa)
  • Ltv Steel (Pittsburgh)
  • Lucent Technologies Inc (Allentown)
  • Lucent Technologoes (Reading)
  • Lucerne Mines (Indiana)
  • Lucy Furnaces (Pittsburgh)
  • Ludlow Elementary School (Philadelphia)
  • Luke Fidler Colliery (Shamokin)
  • Lukens Iron and Steel Company (Coatesville)
  • Lukens Steel Company (Coatesville)
  • Lupton Manufacturing Company (Philadelphia)
  • Luzerne County Gas and Electric Company (Plymouth)
  • L Winteres (Philadelphia)
  • Lycoming Edison Company (Williamsport)
  • Lycoming Electric Company (Williamsport)
  • Lycoming Rubber Company (Williamsport)
  • Lytle Coal Company (Minersville)
  • L. Sonnebarn Sons Inc (Petrolia)
M
  • M & G Industrial (Pittsburgh)
  • M.H. Detrick (Fairless)
  • M.H. Pickering (Pittsburgh)
  • M. L. Bayard and Company (Philadelphia)
  • M. S. A. Research Center (Callery)
  • M. Schnoll & Sons (Philadelphia)
  • M.T. Seakite (Chester)
  • Mabel Furnace (Sharpsville)
  • Machine Shop (Altoona)
  • Machold and Riddell (Philadelphia)
  • Mack Axe Works (Beaver Falls)
  • Mackintosh-Hemphill Company (Pittsburgh)
  • Mack Truck (Allentown)
  • Mack Warehouse (Philadelphia)
  • Mac Service Incorporated (Windber)
  • Magee Carpet Company (Bloomsburg)
  • Magee Womens Hospital (Pittsburgh)
  • Maginn and Lewis (Pittsburgh)
  • Mahoning Rolling Mill Company (Danville)
  • Mahoning Valley Iron Company (Pittsburgh)
  • Majestic Apartment House (Philadelphia)
  • Mall Office Building (Philadelphia)
  • Malthby Colliery (Wyoming)
  • Manayunk (Philadelphia)
  • Manchester Station (Pittsburgh)
  • M and W H Nixon Paper Company (Philadelphia)
  • Manganese Steel Forge Company (Philadelphia)
  • Mann Brothers (Harrisburg)
  • Marathon Company (Lester)
  • Marcal Paper Mills, Inc (Philadelphia)
  • Marcus Hook Plant (Marcus Hook)
  • Marietta Metal Products Corporation (Philadelphia)
  • Marker & Sons (McKeesport)
  • Marks Brothers (Philadelphia)
  • Marlsbary Manufacturing Company (Uniontown)
  • Marquette Cement (Neville Island [Neville Township])
  • Marquette Cement Manufacturing. Company (Pittsburgh)
  • Marsden T J Company (Pottsville)
  • Marshall Brothers and Company (Philadelphia)
  • Marshall Kennedy Company (Allegheny)
  • Marshall Kennedy Company (Pittsburgh)
  • Martin and W H Nixon (Philadelphia)
  • Martin and Wm Nixon Paper Company (Pencoyd)
  • Martin Luther King Junior School (Philadelphia)
  • Martins Creek Powerhouse (Martins Creek)
  • Maryd Coal Company (Hazleton)
  • Maryland Steel Company (Philadelphia)
  • Mary Street Project (Kingston)
  • Marywood College (Kingston)
  • Mary Wood College (Scranton)
  • Masland Duraleather Company (Philadelphia)
  • Masonic Temple (Pottstown)
  • Masonry Construction Company (Philadelphia)
  • Masonry Inc (Carnegie)
  • Matthiessen and Hegeler Zinc Company (Elrama)
  • Mauch Chunk Crystal Ice Company (Mauch Chunk)
  • Mauch Chunk H. Power and Electric Light Company (Mauch Chunk)
  • Mauch Chunk Lehighton and Slatington Railway Company (Allentown)
  • Mauch Chunk Lehighton and Slatington Railway Company (Mauch Chunk)
  • Max and Levy Building (Philadelphia)
  • Max Brockton Textile Company (Philadelphia)
  • Maxwell Colliery (Ashley)
  • McArdle & Cooney Inc. (Philadelphia)
  • McAvey Brick Company (Phoenixville)
  • McCahan Sugar Refining and Molasses Company (Philadelphia)
  • McCarter Iron Works (Norristown)
  • McClair, Brooks and Company (Scranton)
  • McClaskey & Company (Philadelphia)
  • McClintic-Marshall Construction Company (Carnegie)
  • McClintic Marshall Constr Company (Pottstown)
  • McCloskey Construction (Philadelphia)
  • McCloskey Varnish Company (Philadelphia)
  • McClure Company (Washington)
  • McConnell Asbesto and Covering Company (Etna)
  • McConway & Torley Corp (Pittsburgh)
  • McConway and Forley Company (Pittsburgh)
  • McCracken Stark and Company (Philadelphia)
  • McCreary Tire & Rubber Company (Indiana)
  • McCullough Iron Company (Philadelphia)
  • Mc Daniel and Harvey (Philadelphia)
  • McEnery Company (Erie)
  • McGraw-Edison (Washington)
  • McGraw-Edison Power Systems (Canonsburg)
  • McGraw Edison Company (Canonsburg)
  • McGraw Edison Company (Pittsburgh)
  • McGrew Parkinson and Company (Monongahela)
  • McGuinnes Company (Pittsburgh)
  • McKay Corporation (York)
  • McKean, Newhall and Borie (Philadelphia)
  • McKee Division (Jeanette)
  • McKeesport and Youghiogheny Ice Company (McKeesport)
  • McKeesport Hospital (McKeesport)
  • McKeesport Manufacturing Company (McKeesport)
  • McKeesport Tin Plate Company (McKeesport)
  • McKeesport Water and Light Company (McKeesport)
  • McKeesport Water Purification Works (McKeesport)
  • McKeesport Works (McKeesport)
  • McKees Rocks Ind Enterprises (McKees Rocks)
  • McKinley Elementary School (York)
  • McKinney Manufacturing Company (Allegheny)
  • McLanahan Corporation (Hollidaysburg)
  • McLaughlin Brothers (Philadelphia)
  • McLean Newhall and Borie (Philadelphia)
  • Meadowvale School (Johnstown)
  • Mechanical Insulation Company (Lester)
  • Medford\’s Inc. (Chester)
  • Medical College of Pennsylvania School (Philadelphia)
  • Medium Voltage Swgr. Department (Philadelphia)
  • Medusa Cement Company (York)
  • Medusa Portland Cement Company (York)
  • Mellon Bank Old Us Building (Pittsburgh)
  • Mens House of Detention (Philadelphia)
  • Men\’s House of Detention (Philadelphia)
  • Mercer County Light Company (Greenville)
  • Merchants Coal Company (Boswell)
  • Merchant Shipbuilding Corporation (Bristol)
  • Merck, Sharp and Dohme (West Point)
  • Merck and Company (Lansdale)
  • Merck and Company Inc (West Point)
  • Merck Chemical (Danville)
  • Mercy Douglas Hospital (Philadelphia)
  • Mercy Hospital (Altoona)
  • Mercy Hospital (Pittsburgh)
  • Merion and Radnor Gas and Electric Company (Wayne)
  • Mermount Gardens (Bryn Mawr)
  • Merrick Chemical Plant (Danville)
  • Merritt Chapman & Scott (Milton)
  • Mesta Machine Company (Homestead)
  • Mesta Machine Company (Pittsburgh)
  • Mesta Machine Corp (New Castle)
  • Metropolitan Edison-Tmi (Harrisburg)
  • Metropolitan Edison Company (Middletown)
  • Metropolitan Edison Company (Philadelphia)
  • Metropolitan Edison Company (Portland)
  • Metropolitan Edison Company (Reading)
  • Metropolitan Edison Company Dock St. Station (Easton)
  • Metropolitan Edison Power Plant (Portland)
  • Metropolitan Electric Company (Reading)
  • Metropolitan Hospital (Philadelphia)
  • Michael Flynn Manufacturing (Philadelphia)
  • Michigan Chemical Company (Pittsburgh)
  • Middle Creek Electric Company (Sunbury)
  • Middletown Air Force Base (Harrisburg)
  • Middletown Car Company (Middletown)
  • Middletown Car Works (Middletown)
  • Middletown Elementary School (Middletown)
  • Midland-Ross Corp (Pittsburgh)
  • Midland Steel Company (Midland)
  • Midland Works (Midland)
  • Miduale-Heppenstahl (Philadelphia)
  • Midvale Company (Philadelphia)
  • Midvalee Heppenstall Company (Nicetown)
  • Midvale Heppenstall Company (Eddystone)
  • Midvale Heppenstall Company (Philadelphia)
  • Midvale Steel and Ordnance Col (Philadelphia)
  • Midvale Steel and Ordnance Company (Nicetown)
  • Midvale Steel Company (Nicetown)
  • Midvale Steel Company (Philadelphia)
  • Midvalley Coal Company (Mauch Chunk)
  • Midvalley Coal Company (Mount Carmel)
  • Midvalley Coal Company (Philadelphia)
  • Midwest Generation (Homer City)
  • Milco Undergarment Company (Bloomsburg)
  • Millard Quarry (Annville)
  • Millbourne Mills (Philadelphia)
  • Millcreek Mall (Erie)
  • Mill Creek Power House (Johnstown)
  • Mill Creek School (Erie)
  • Miller Robert L (Mechanicsburg)
  • Milliken Hospital Boiler Room (Pottsville)
  • Milton Manufacturing Company (Milton)
  • Minard Run Oil Company (Bradford)
  • Mineral Railroad and Mining Company (Wilkes Barre)
  • Mineral Railway and Mining Company (Shamokin)
  • Mineral Spring Colliery (Wilkes Barre)
  • Mine Safety Appliance Company (Callery)
  • Mine Safety Appliance Company (Philadelphia)
  • Mine Safety Appliance Company (Pittsburgh)
  • Minnepolis Honeywell Reg. Company (Philadelphia)
  • Minnesota Mining & Manufacturing Company (Bristol)
  • Minotte Brothers Company (Pittsburgh)
  • Mira Bell, Inc. (Philadelphia)
  • Miseracordia (Kingston)
  • Mitchell, Fletcher and Company (Philadelphia)
  • Mitchell Power Station (Courtney)
  • Mitchell Power Station (Monongahela)
  • M Miller Spring & Manufacturing Company (Pittsburgh)
  • Mobay Chemical Company (Pittsburgh)
  • Mobil (Philadelphia)
  • Mobil Oil Company (Philadelphia)
  • Model Laundry and Dry Cleaning Company (Jeanette)
  • Moe & Company A (Philadelphia)
  • Moe A & Company (Philadelphia)
  • Mohawk Valley Brewing Company (Philadelphia)
  • Mohoningtown Shops (New Castle)
  • Monessen Works (Monessen)
  • Monongahela Connecting Railroad Company (Pittsburgh)
  • Monongahela Electric Light Company (Homestead)
  • Monongahela Furnaces (McKeesport)
  • Monongahela Incline Plane Company (Pittsburgh)
  • Monongahela Light and Power Company (Pittsburgh)
  • Monongahela Natural Gas Company (Pittsburgh)
  • Monongahela Power Company\’S (Masontown)
  • Monongahela Power Station (Monongahela)
  • Monongahela River Cons. Coal and Coke Company (Pittsburgh)
  • Monongahela St. Railway Company (Pittsburgh)
  • Monongalia & Ohio Dredging Company (Pittsburgh)
  • Monougahela Melting Company (Altoona)
  • Monroeville High School (Monroeville)
  • Monroeville Mall (Monroeville)
  • Monsanto Chemical Company (Philadelphia)
  • Monsey Products Company (Philadelphia)
  • Montefoire Hospital (Pittsburgh)
  • Montgomery Iron Company (Port Kennedy)
  • Montour Cty (Danville)
  • Montour Power Plant (Washingtonville)
  • Montour Steel and Iron Company (Danville)
  • Moore College of Art (Philadelphia)
  • Moorehead Brothers and Company (Pittsburgh)
  • Moorhead Brothers and Company (Sharpsburg)
  • Moravian College (Bethlehem)
  • Morganthaler Brothers (Philadelphia)
  • Morgenthaler Ice Manufacturing Company (Philadelphia)
  • Moro Phillips (Philadelphia)
  • Morrell Felin Meat Packers (Philadelphia)
  • Morris School (Philadelphia)
  • Moss Rehabilitation Hospital (Philadelphia)
  • Mother of Divine Grace (Philadelphia)
  • Mount. Lookout Coal Company (Wyoming)
  • Mount Morich (Philadelphia)
  • Mount Sinai Hospital (Philadelphia)
  • Mount St. Joseph Academy (Philadelphia)
  • Mrs Paul’s Frozen Foods (Philadelphia)
  • Muhlenberg High School (Philadelphia)
  • Municipal Hospital (Philadelphia)
  • Municipal Services Building (Philadelphia)
  • Munition Plant (Tacony)
  • Murray Body Company (Scranton)
  • Murray Corp (Scranton)
  • Mutual Chemical Div of Allied Chemical and Dye (Philadelphia)
  • Mutual Rendering Company (Philadelphia)
N
  • N. Snellenburg and Company (Philadelphia)
  • Nabisco (Philadelphia)
  • N and G Taylor Company (Philadelphia)
  • Nat. Tube Works. Company (McKeesport)
  • National Airoil Burner Company (Philadelphia)
  • National Aniline and Chemical Company (Marcus Hook)
  • National Aniline Division – Uss Chemicals (McKees Rocks)
  • National Biscuit Company (Philadelphia)
  • National Biscuit Company (Pittsburgh)
  • National Biscuit Plant (Pittsburgh)
  • National Bond Insulators, Inc. (Allentown)
  • National Borax Company (Lancaster)
  • National Casket Company Inc (Pittsburgh)
  • National Casting (Sharon)
  • National Container Company (Bristol)
  • National Crucible Company (Philadelphia)
  • National Electric Products Corp (Ambridge)
  • National Foam Company (West Chester)
  • National Forge and Ordnance Company (Irvin)
  • National Galvanizing Company (Pittsburgh)
  • National Galvanizing Works (McKeesport)
  • National Gypsum Company (Milton)
  • National Heat & Power (Philadelphia)
  • National Lead and Oil Company (Allegheny)
  • National Lead Company (Philadelphia)
  • National Lead Company (Pittsburgh)
  • National Malleable (Sharon)
  • National Mining Company (Pittsburgh)
  • National Molasses (Philadelphia)
  • National Radiator Company (Johnstown)
  • National Rolling Mill (McKeesport)
  • National Steel Company (New Castle)
  • National Steel Company (Pittsburgh)
  • National Steel Company (Sharon)
  • National Steel Service Center, Inc. (New Castle)
  • National Sugar Refinery Company (Philadelphia)
  • National Supply (Pittsburgh)
  • National Supply Company (Ambridge)
  • National Supply Company (Etna)
  • National Tube (Ellwood City)
  • National Tube Company (Chester)
  • National Tube Company (McKeesport)
  • National Tube Company (Philadelphia)
  • National Tube Company (Pittsburgh)
  • National Tube Works Company (McKeesport)
  • National Valve (Lawrenceville)
  • Natural Gas Pipeline (Nazareth)
  • Naval Air Station (Philadelphia)
  • Naval Air Station (Willow Grove)
  • Naval Aviation Supply Depot (Philadelphia)
  • Naval Dry Dock (Philadelphia)
  • Naval Ordnance Works (Midland)
  • Naval Ship Engineering Center (Philadelphia)
  • Naval Supply Depot (Mechanicsburg)
  • Naval Supply Depot (Philadelphia)
  • Navy Propulsion Plant (Greensburg)
  • Navy Yard Dry Dock (Philadelphia)
  • Nazareth Cement Company (Nazareth)
  • Nazareth Hospital (Philadelphia)
  • Nazareth Portland Cement Company (Nazareth)
  • Nazareth Steel Fabricators (Nazareth)
  • Neatsfoot Oil Refineries (Philadelphia)
  • Nelson Valve Company (Philadelphia)
  • Nesbitt Manufacturing Company (Philadelphia)
  • Neville Chemical Company (Neville Island [Neville Township])
  • Neville Chemical Company (Pittsburgh)
  • Neville Island Coke & Chemical (Neville Island [Neville Township])
  • Neville Island Coke & Chemical (Pittsburgh)
  • Neville St. Apartments (Pittsburgh)
  • New Air Cond System Closure Plant (Lancaster)
  • Newark Processing Company (Chester)
  • New Castle Electric Company (New Castle)
  • New Castle L.H.And Power Company (New Castle)
  • New Castle Plant (New Castle)
  • New Castle Portland Cement Company (New Castle)
  • New Castle Shovel Company (New Castle)
  • New Castle Stamp\’G Company (New Castle)
  • New Castle Station (Pittsburgh)
  • New Castle Water Company (New Castle)
  • New Duquesne Science Hall (Pittsburgh)
  • New Federal Building (Pittsburgh)
  • New Federal Office Building (Philadelphia)
  • New Jersey Mills (Philadelphia)
  • Newman & Company Inc (Philadelphia)
  • New Pellet Plant (Cornwall)
  • New River Rocahontas Consolidated Coal Company (Philadelphia)
  • New Sr. High School (Lancaster)
  • New Steel Building (Butler)
  • Newton Coal Mining Company (Pittston)
  • New York & Pennsylvania Company, Inc. (Johnsonburg)
  • New York & Pennsylvania Company, Inc. (Lock Haven)
  • New York Philadelphia and Norfolk Railway Company (Philadelphia)
  • New York Shipbuilding Company (Philadelphia)
  • New York State Electric & Gas Corporation (Lawrenceville)
  • New York State Natural Gas (Lawrenceville)
  • New York Wilkins Company Engs. (Pittsburgh)
  • New York Wire Cloth Company (York)
  • Nice Ball Bearing Company (Philadelphia)
  • Nicetown Plate Washer Company (Nicetown)
  • Nicetown Station (Philadelphia)
  • Nicholson File Company (Philadelphia)
  • Nickel Plumbing & Heating (Pittsburgh)
  • Nicolet Industries (Ambler)
  • Niles Bement Pond Company (Nicetown)
  • Niles Bement Pond Company (Philadelphia)
  • Niles Building (Philadelphia)
  • Nixon Theatre (Pittsburgh)
  • Noah Barlow (Philadelphia)
  • Norfolk & Western Railroad (Erie)
  • Norland Shipping & Trading Company (Morrisville)
  • Norris Smelting & Refining (Swedeland)
  • Norristown Hospital (Norristown)
  • Norristown Magnesia and Asbestos Company (Norristown)
  • Norristown Municipal Sanitation Department (Norristown)
  • Norristown Post Office (Norristown)
  • Norristown State Hospital (Norristown)
  • North 1 Shaft (Nanticoke)
  • North 2 Shaft (Nanticoke)
  • North 4 Colliery (Jeddo)
  • North American Construction Company (Pittsburgh)
  • North American Lace Company (Philadelphia)
  • Northampton Traction Company (Easton)
  • North Branch Steel Company (Danville)
  • North Brothers Company (Coatesville)
  • North Brothers Manufacturing Company (Philadelphia)
  • North Cambia St. Railway Company (Pittsburgh)
  • North Cornwall Furnace Company (Cornwall)
  • Northern Ore Company (Easton)
  • North Huntington Twp High School (Irwin)
  • North Pipe Shop (Aliquippa)
  • North Reserve Basin (Philadelphia)
  • North Side of Industrial Highway (Eddystone)
  • North Side Packing Company (Pittsburgh)
  • Northview Heights Elementary School (Pittsburgh)
  • Northview Housing (Pittsburgh)
  • Northwest Collery (Carbondale)
  • Northwestern Penna Railway Company (Meadville)
  • Nosco (Erie)
  • Nottingham Colliery 15 (Plymouth)
  • Novingers, Incorporated (Harrisburg)
  • N R S Yewdall (Philadelphia)
  • Number 2 Shaft Colliery (Kingston)
  • Number 3 Boilder House (Nicetown)
  • Number 3 Rollilng Mill (Johnstown)
  • Number 4 Breaker (Kingston)
  • Number 4 Colliery (Kingston)
  • Number 4 Rolling Mill (Johnstown)
  • Number 5 and Number 6 Blast Furnace (Johnstown)
  • Number 8 Grutier Mill (Johnstown)
  • Nutrition Products (Philadelphia)
  • Nuttal Works (Pittsburgh)
O
  • O.F. Zurn (Philadelphia)
  • Oak Summit Apts (Philadelphia)
  • Occidental Chemical (Pottstown)
  • Ocean Coal Company (Philadelphia)
  • Of America Park Workers (Pittsburgh)
  • Office & Whse. R. C. A. (Lancaster)
  • Ohio and Pittsburgh Milk Company (Pittsburgh)
  • Ohio Pennsylvania System (New Castle)
  • Oil City Glass Company (Oil City)
  • Old Forge Breaker (Dunmon)
  • Old Forge Collieries (Scranton)
  • Old Fourth Ward School (Pittsburgh)
  • Oldman Boiler Works (Erie)
  • Old Meadow Works (Pittsburgh)
  • Olin Mathieson Chemical Corporation (McKees Rocks)
  • Oliver and Roberts Wire Company (Pittsburgh)
  • Oliver and Snyder Steel Company (Allegheny)
  • Oliver and Snyder Steel Company (Pittsburgh)
  • Oliver Building (Pittsburgh)
  • Oliver Iron & Steel Company (Pittsburgh)
  • Oliver Iron Mining Company (Pittsburgh)
  • Oliver Iron Steel Company (Pittsburgh)
  • Oliver Wire Company Ltd (Pittsburgh)
  • Olmstead Air Force Base (Middletown)
  • Olney High School (Philadelphia)
  • Olson Engineering (Pittsburgh)
  • Olyphant Colliery (Olyphant)
  • Olyphant Power Plant (Olyphant)
  • Onderdonk Heating and Ventilating Company (Philadelphia)
  • Open Hearth Div (Homestead)
  • Open Hearth Plant (Johnstown)
  • Orient Coal and Coke Company (Uniontown)
  • Orinoka Mills (Philadelphia)
  • Orion Power Holdings Inc (Elrama)
  • Orion Power Holdings Inc (New Castle)
  • Orr & Sembower Inc (Reading)
  • Osborn Machine Company (DuBois)
  • Oscar Meyer Meats (Philadelphia)
  • Otis Steel Company (Pittsburgh)
  • Our Lady of Mercy Academy (Monroeville)
  • Our Lady of Mercy School (Monroeville)
  • Our Lady of Mt Carmel Convent (Carbondale)
  • Overbroock Steam Heat Company (Philadelphia)
  • Owens-Corning Fiberglas Corporation (Berwyn)
  • Owens-Corning Fiberglas Corporation (Philadelphia)
  • Owens-Illinois Glass Company (Pittston)
  • Owens Corning Fiberglass (Berwick)
  • Owens Illinois Glass Company (Clarion)
  • Ozenda Smokeless Coal Company (Boswell)
  • O’Brien Machinery Company (Philadelphia)
  • O’Brien Rubber Thread and Webbing Company (Catasauqua)
P
  • P & L (McKees Rocks)
  • P. C. C. St. L. Railway Company (Pittsburgh)
  • P.F. Magin and Company (Pittsburgh)
  • P.H. Berman & Sons (Philadelphia)
  • P.H. Glatfelder Company (Spring Grove)
  • P. J. Ritter Company (Philadelphia)
  • P.Mcgraw and Wool Company (Allegheny)
  • P. Mcgraw Wool Company (Pittsburgh)
  • P.P.G. Industries (Pittsburgh)
  • Pa. Institute For The Instruction of The Blind (Philadelphia)
  • Pacor (Chester)
  • Pa Forge Div of Chertron Corp (Philadelphia)
  • Page Steel & Wire Company (Monessen)
  • Page Woven Wire Fence Company (Monessen)
  • Palmerweld Fabricating Company (Ambler)
  • P and L. E. Railroad (Pittsburgh)
  • Pangborn Corporation (Bethlehem)
  • Pangborn Corporation (Homestead)
  • Papercraft Plant (Pittsburgh)
  • Paper Manufacturers (Philadelphia)
  • Parish Div. Dana (Reading)
  • Park City Shops (Lancaster)
  • Parkersburg Iron and Steel Company (Pittsburgh)
  • Park Hotel (Williamsport)
  • Park Steel Works (Pittsburgh)
  • Parkview Court Apts (Yeadon)
  • Parkway Apt. (Harrisburg)
  • Passavant Hospital (Pittsburgh)
  • Paterson Parchment Paper Company (Bristol)
  • Paul B. Hendel & Company (Reading)
  • Paxtang Electric Company (Harrisburg)
  • Paxton Iron and Steel Company (Harrisburg)
  • Paxtron Furnaces (Harrisburg)
  • Peabody Vertical Air Heater (Newell)
  • Peachbottom Nuclear Plant (Delta)
  • Peach Bottom Nuclear Power Plant (Peach Bottom)
  • Pearson Manufacturing Company Inc (Pittsburgh)
  • Peckerman Company (Philadelphia)
  • Peco-Barbados Island Powerhouse (Norristown)
  • Peco Chemical (Chester)
  • Peco Cromby Station Powerhouse (Phoenixville)
  • Peco Delaware Station Powerhouse (Philadelphia)
  • Peco Eddystone Station Powerhouse (Eddystone)
  • Peerless Dye Company (Philadelphia)
  • Pencoyd Iron Works (Pencoyd)
  • Pencoyd Iron Works (Philadelphia)
  • Penelec Power Plant (Shawville)
  • Penn-Bradford Appl. (Philadelphia)
  • Penn Argyl High School (Pen Argyl)
  • Pennsylvania Allen Port Cement Company (Allentown)
  • Pennsylvania Electric Company (Homer City)
  • Pennsylvania Steel Company (Philadelphia)
  • Pennsylvania Manufacturing Light and Power Company (Philadelphia)
  • Pennsylvania State Hospital (Philadelphia)
  • Pennsylvania Water Company (Wilkinsburg)
  • Pennsylvania Bolt and Nut Company (Lebanon)
  • Pennsylvania Gas Coal Company (Irwin)
  • Pennsylvania General Imp. Company (Philadelphia)
  • Pennsylvania Hardward Company (Reading)
  • Pennsylvania Hospital (Philadelphia)
  • Pennsylvania Light, Heat and Power Company (Allegheny)
  • Pennsylvania Lines West of Pitts (Allegheny)
  • Pennsylvania Allen Port Cement Company (Bath)
  • Pennsylvania Railroad Company (Philadelphia)
  • Pennsylvania Utilities Investment Corp (Scranton)
  • Penn Bradford Company (Philadelphia)
  • Penn Center (Philadelphia)
  • Penn Central Light and Power Company (Altoona)
  • Penn Dairies (Lancaster)
  • Penn Dixie Cement Company (Nazareth)
  • Penn Fishing (Philadelphia)
  • Penn Gas Coal Company (Irvin)
  • Penn Hardware Company (Reading)
  • Penn Heat and Power Company (Wilkinsburg)
  • Penn High School (Kingston)
  • Penn Jersey Transmission Corporation (Boyertown)
  • Penn Manufacturing Light Ht. and Power Company (Philadelphia)
  • Penn Mo Fire Brick Company (Harrisburg)
  • Penn Mo Firebrick Company (Pittsburgh)
  • Penn Optical (Reading)
  • Penn Power & Light Company (Martins Creek)
  • Penn Public Service Corp (Johnstown)
  • Penn Public Service Corp (Seward)
  • Penn Range Company (Philadelphia)
  • Pennsalt Chemical Company (Philadelphia)
  • Pennsalt Chemicals Corp (King of Prussia)
  • Pennsbury Pottery Company (Morrisville)
  • Penn Shipbuilding (Chester)
  • Penn State Educational Association Building (Harrisburg)
  • Penn State University (State College)
  • Pennsylvania Academy of Fine Arts (Philadelphia)
  • Pennsylvania Bolt and Nut Company (Lebanon)
  • Pennsylvania Brake Beam Company (Danville)
  • Pennsylvania Cement Company (Bath)
  • Pennsylvania Central Railroad (Philadelphia)
  • Pennsylvania Chocolate Company (Pittsburgh)
  • Pennsylvania Coal Company (Dunmon)
  • Pennsylvania Coal Company (Dunmore)
  • Pennsylvania Coal Company (Pittston)
  • Pennsylvania Coal Company (Scranton)
  • Pennsylvania Coal Company (Wyoming)
  • Pennsylvania Cola Company (Dunmore)
  • Pennsylvania Electric Company (Altoona)
  • Pennsylvania Electric Company (Erie)
  • Pennsylvania Electric Company (Johnstown)
  • Pennsylvania Electric Company (New Florence)
  • Pennsylvania Electric Company (Seward)
  • Pennsylvania Electric Company (Shawville)
  • Pennsylvania Electric Company (Shelocta)
  • Pennsylvania Electric Company (Williamsburg)
  • Pennsylvania Fruit (Philadelphia)
  • Pennsylvania Gas & Water Company (Wilkes Barre)
  • Pennsylvania Gas Company (Erie)
  • Pennsylvania General Electric Company (Pittsburgh)
  • Pennsylvania Hospital (Philadelphia)
  • Pennsylvania Industrial Chemical Company (Chester)
  • Pennsylvania Industrial Chemical Company (Clairton)
  • Pennsylvania Iron Company (Lancaster)
  • Pennsylvania Leightweight Aggregate (Bangor)
  • Pennsylvania Light and Power Company (Allegheny)
  • Pennsylvania Lubricating Company (Pittsburgh)
  • Pennsylvania Malleable Company (McKees Rocks)
  • Pennsylvania Malleable Company (Pittsburgh)
  • Pennsylvania Mutual Building (Philadelphia)
  • Pennsylvania Mutual Insurance Company (Philadelphia)
  • Pennsylvania Power & Light (Allentown)
  • Pennsylvania Power & Light (Harrisburg)
  • Pennsylvania Power & Light (Pittsburgh)
  • Pennsylvania Power & Light (Sunbury)
  • Pennsylvania Power & Light Company (Lancaster)
  • Pennsylvania Power & Light Company (Martins Creek)
  • Pennsylvania Power & Light Company (Scranton)
  • Pennsylvania Power & Light Company (Shamokin Dam)
  • Pennsylvania Power & Light Company (Shippingport)
  • Pennsylvania Power & Light Company (Washingtonville)
  • Pennsylvania Power & Light Company (York Haven)
  • Pennsylvania Power and Light Company (Hauto)
  • Pennsylvania Power Company (Ellwood City)
  • Pennsylvania Power Company (New Castle)
  • Pennsylvania Pulp and Paper Company (Lock Haven)
  • Pennsylvania Railroad (Chester)
  • Pennsylvania Railroad (Erie)
  • Pennsylvania Railroad Company (Altoona)
  • Pennsylvania Railroad Company (Enola)
  • Pennsylvania Railroad Company (Philadelphia)
  • Pennsylvania Railroad Company (Pittsburgh)
  • Pennsylvania Railroad Company (Pottsville)
  • Pennsylvania Railroad Company (Reading)
  • Pennsylvania Railroad Office (Philadelphia)
  • Pennsylvania Railroad Samuel Rea Car Repair Shop (Hollidaysburg)
  • Pennsylvania Range Boiler (Philadelphia)
  • Pennsylvania Rubber Company (Erie)
  • Pennsylvania Rubber Company (Jeanette)
  • Pennsylvania Smelting & Refining Company (Philadelphia)
  • Pennsylvania State College (State College)
  • Pennsylvania State Park (Pittsburgh)
  • Pennsylvania Steel Company (Lebanon)
  • Pennsylvania Steel Company (Philadelphia)
  • Pennsylvania Steel Company (Steelton)
  • Pennsylvania Steel Mill (Chester)
  • Pennsylvania Sugar Company (Philadelphia)
  • Pennsylvania Tube Company (Pittsburgh)
  • Pennsylvania Utilities Company (Easton)
  • Penn Tech (Johnsonburg)
  • Penn Township Junior High School (Pittsburgh)
  • Penn Treaty American Corporation (Philadelphia)
  • Penn Treaty Overall (Philadelphia)
  • Pennzoil (Rouseville)
  • Pennzoil Refinery (Oil City)
  • Pennzoil Refining Company (Rouseville)
  • Peoples Bank (Wilkes Barre)
  • Peoples Bank Building (Pittsburgh)
  • Peoples Coal Company (Scranton)
  • Peoples Consolidated Service Corptn (Easton)
  • Peoples Construction (Philadelphia)
  • Peoples Electric Light Heat and Power Company (Greenville)
  • Peoples Ice Light and Storage Company (McKeesport)
  • Peoples Incandescent Light and Power Company (Meadville)
  • Peoples Land Company (Pittsburgh)
  • Peoples Natural Gas Company (Lawrenceville)
  • Peoples Savings & Trust Building (Pittsburgh)
  • Peoples St. Railway Company (Nanticoke)
  • Peoples St. Railway Company (Wanamie)
  • People Traction Company (Philadelphia)
  • Pep Boys (Philadelphia)
  • Perlstein Glass Company (Philadelphia)
  • Perma Company Lines West of Pittsburgh (Allegheny)
  • Perry Iron Company (Erie)
  • Peter F. Loftus (Pittsburgh)
  • Peters and Company (McKeesport)
  • Peters Packing Company (McKeesport)
  • Petroleum Iron Works (Sharon)
  • Petroleum Reclamation Company (Bradford)
  • Peyna Power and Lgt. Company (Scranton)
  • Pfizer Inc. (Easton)
  • P G H Steamline (Philadelphia)
  • Pgw (Philadelphia)
  • P H Gladfelter Company (York)
  • Philadelphia Exposition (Philadelphia)
  • Philadelphia and Reading (Mount Carmel)
  • Philadelphia and Reading Railway (Philadelphia)
  • Philadelphia and Reading Railway (Reading)
  • Philadelphia Rapid Transit Company (Philadelphia)
  • Philadelphia and Reading Coal and Iron Company (Minersville)
  • Philadelphia and Reading Coal and Iron Company (Pottsville)
  • Philadelphia and Reading Railroad Company (Reading)
  • Philadelphia and Reading Subway (Philadelphia)
  • Philadelphia Aquatic Club (Philadelphia)
  • Philadelphia Bank Building (Philadelphia)
  • Philadelphia Board of Education (Philadelphia)
  • Philadelphia Brewing Company (Philadelphia)
  • Philadelphia Burner Serv (Philadelphia)
  • Philadelphia City Hall (Philadelphia)
  • Philadelphia Coke Company (Philadelphia)
  • Philadelphia College of Pharmacy (Philadelphia)
  • Philadelphia Company of Pittsburg (Pittsburgh)
  • Philadelphia Convention Hall (Philadelphia)
  • Philadelphia County Prison (Philadelphia)
  • Philadelphia Dry Yeast (Philadelphia)
  • Philadelphia Dye Works (Philadelphia)
  • Philadelphia Electric (Bridgeport)
  • Philadelphia Electric (Delta)
  • Philadelphia Electric (Eddystone)
  • Philadelphia Electric Company (Chester)
  • Philadelphia Electric Company (Norristown)
  • Philadelphia Electric Company (Philadelphia)
  • Philadelphia Electric Company (Phoenixville)
  • Philadelphia Electric Company (Tacony)
  • Philadelphia Electric Plant (Philadelphia)
  • Philadelphia Electric Powerhouse (Philadelphia)
  • Philadelphia Engineering Company (Philadelphia)
  • Philadelphia Fire Department (Philadelphia)
  • Philadelphia Forge Company (Philadelphia)
  • Philadelphia Gas & Electric (Philadelphia)
  • Philadelphia Gas Works Company (Philadelphia)
  • Philadelphia General Hospital (Philadelphia)
  • Philadelphia Greyhound Terminal (Philadelphia)
  • Philadelphia Group (Philadelphia)
  • Philadelphia Hospital For Insane (Philadelphia)
  • Philadelphia Housing Authority (Philadelphia)
  • Philadelphia Incinerator (Philadelphia)
  • Philadelphia Inquirer (Philadelphia)
  • Philadelphia International Airport (Philadelphia)
  • Philadelphia Ironworks (Philadelphia)
  • Philadelphia Museum (Philadelphia)
  • Philadelphia Naval Shipyard (Navy Yard) (Philadelphia)
  • Philadelphia Piping & Equipment Company (Bristol)
  • Philadelphia Protectory For Boys (Phoenixville)
  • Philadelphia Psychiatric Hospital (Philadelphia)
  • Philadelphia Public Library (Philadelphia)
  • Philadelphia Quartz Company (Chester)
  • Philadelphia Quartz Company (Philadelphia)
  • Philadelphia Rapid Transit Company (Philadelphia)
  • Philadelphia Reading Corp (Pottsville)
  • Philadelphia Resin Company (Philadelphia)
  • Philadelphia Roll & Machine (Philadelphia)
  • Philadelphia Rubber Works. Company (Oaks)
  • Philadelphia Rust (Philadelphia)
  • Philadelphia S&C 10 (Berwyn)
  • Philadelphia School District (Philadelphia)
  • Philadelphia Steam Heating Company (Philadelphia)
  • Philadelphia St Hospital (Philadelphia)
  • Philadelphia Suburban Gas and Electric Company (West Chester)
  • Philadelphia Suburban Water Company (Bryn Mawr)
  • Philadelphia Tapestry Mills (Philadelphia)
  • Philadelphia Traction Company (Philadelphia)
  • Philadelphia Zoo (Philadelphia)
  • Philadelphia Traction Company (Philadelphia)
  • Philadelpia Electric Company (Philadelphia)
  • Philadelphia Inquirer Garage (Philadelphia)
  • Philadelphia Suburban Gas and Electric Company (West Chester)
  • Phil Ellena and Chew Sts. (Philadelphia)
  • Philip Cary Manufacturing Company (Plymouth Meeting)
  • Phillip Carey (Plymouth)
  • Phillip Carey Manufacturing Company (Philadelphia)
  • Phillips Power Station (South Heights)
  • Phoenix Cement Company (Nazareth)
  • Phoenix Glass Company (Monaca)
  • Phoenix Glass Company (Pittsburgh)
  • Phoenix Iron and Steel Company (Chester)
  • Phoenix Iron and Steel Company (Harrisburg)
  • Phoenix Iron Company (Phoenixville)
  • Phoenix Steel Corp (Phoenixville)
  • Phoenix Utility Company (Williamsport)
  • Phoenixville Hospital (Phoenixville)
  • Phoenixville Incinerator (Phoenixville)
  • Phoenixville Steel (Phoenixville)
  • Physical Test Labs. (Coatesville)
  • Physicians and Dentist Building (Philadelphia)
  • Pickett Middle School (Philadelphia)
  • Pilot Plant (Pittsburgh)
  • Pilot Plant Division (Philadelphia)
  • Pine Knot Colliery (Minersville)
  • Pitt Comm Heat Treating (Pittsburgh)
  • Pittron (McKeesport)
  • Pitts. Coal Aspen M Miller (Pittsburgh)
  • Pitts. McKeesport and Westmoreland St. Railway Company (McKeesport)
  • Pittsburgh Coke & Chemical Company (Neville Island [Neville Township])
  • Pittsburgh Activated Carbon Company (Neville Island [Neville Township])
  • Pittsburgh Activated Carbon Company (Pittsburgh)
  • Pittsburgh Airport (Pittsburgh)
  • Pittsburgh and Birmingham Traction Company (Pittsburgh)
  • Pittsburgh and Birmungham Traction Company (Pittsburgh)
  • Pittsburgh and Lake Erie Railroad (Glassport)
  • Pittsburgh and Lake Erie Railroad Company (Pittsburgh)
  • Pittsburgh and Westend Pars. Railway Company (Pittsburgh)
  • Pittsburgh Athletic Association (Pittsburgh)
  • Pittsburgh Brewing Company (Pittsburgh)
  • Pittsburgh Buffalo Company (Pittsburgh)
  • Pittsburgh Coal Company (Allegheny)
  • Pittsburgh Coal Company (Pittsburgh)
  • Pittsburgh Coke & Chemical Company (McKees Rocks)
  • Pittsburgh Coke & Chemical Company (Neville Island [Neville Township])
  • Pittsburgh Coke & Iron Company (Pittsburgh)
  • Pittsburgh Conneaut Dock Company (Pittsburgh)
  • Pittsburgh Consolidation Coal Company (Library)
  • Pittsburgh Crucible Steel Company (Midland)
  • Pittsburgh Ferromanganese Company (Chester)
  • Pittsburgh Forge and Iron Company (Allegheny)
  • Pittsburgh Forge and Iron Company (Pittsburgh)
  • Pittsburgh Gas and Coke Company (Glassport)
  • Pittsburgh Gas and Coke Company (Pittsburgh)
  • Pittsburgh Gear Company (Pittsburgh)
  • Pittsburgh Housing Authority Terrace Village (Pittsburgh)
  • Pittsburgh Iron and Steel Engineering Company (Pittsburgh)
  • Pittsburgh Lake Erie Railroad Company (McKees Rocks)
  • Pittsburgh Lake Erie Rr Depot (Pittsburgh)
  • Pittsburgh McKeesport and Connellsville Railroad (Pittsburgh)
  • Pittsburgh Mechanical Systems Inc (Pittsburgh)
  • Pittsburgh Metal Process (Pittsburgh)
  • Pittsburgh Milling Company (Allegheny)
  • Pittsburgh Milling Company (Pittsburgh)
  • Pittsburgh Plate Glass (Springdale)
  • Pittsburgh Plate Glass Company (Allegheny)
  • Pittsburgh Plate Glass Company (Creighton)
  • Pittsburgh Plate Glass Company (Ford City)
  • Pittsburgh Plate Glass Company (Pittsburgh)
  • Pittsburgh Plate Glass Company (Port Kennedy)
  • Pittsburgh Plate Glass Company (Tarentum)
  • Pittsburgh Plate Glass Industries (Harmarville)
  • Pittsburgh Powerhouse (Pittsburgh)
  • Pittsburgh Press (Pittsburgh)
  • Pittsburgh Provision and Packing Company (Pittsburgh)
  • Pittsburgh Railways (Pittsburgh)
  • Pittsburgh Railways Company (Beaver Falls)
  • Pittsburgh Reduction Company (New Kensington)
  • Pittsburgh Reduction Company (Pittsburgh)
  • Pittsburgh Rochester Coal (Indiana)
  • Pittsburgh Screw & Bolt Company (Pittsburgh)
  • Pittsburgh Screw and Bolt Company (Monaca)
  • Pittsburgh Seamless Tube Company (Beaver Falls)
  • Pittsburgh Shear Knife and Machine Company (Pittsburgh)
  • Pittsburgh Steamship Company (Pittsburgh)
  • Pittsburgh Steel (Midland)
  • Pittsburgh Steel Casting Company (Pittsburgh)
  • Pittsburgh Steel Company (Allenport)
  • Pittsburgh Steel Company (McKees Rocks)
  • Pittsburgh Steel Corp (Monessen)
  • Pittsburgh Steel Foundry (Glassport)
  • Pittsburgh Steel Foundry (Pittsburgh)
  • Pittsburgh Terminal Warehouse and Transfer Company (Pittsburgh)
  • Pittsburgh Thermal (Pittsburgh)
  • Pittsburgh Thermal Ltd Partnership (Pittsburgh)
  • Pittsburgh Tool Steel Wire (Monaca)
  • Pittsburgh University (Pittsburgh)
  • Pittsburgh Valve and Fitting Company (Pittsburgh)
  • Pittsburgh Wire Company (Braddock)
  • Pittsburgh Wire Company (Pittsburgh)
  • Pittsburgh Works (Pittsburgh)
  • Pittsburgh Metal Process (Sharpsburg)
  • Pittsburgh Plate Glass Company (Philadelphia)
  • Pittsburgh Steel Foundry (Pittsburgh)
  • Pittsburgh Coal Company (Pittsburgh)
  • Plant #2 (Franklin)
  • Plant Asbestos Company (Pittsburgh)
  • Plaza Apartments (Philadelphia)
  • Plumb Fayette R Inc (Philadelphia)
  • Plymouth Coal Company (Wilkes Barre)
  • Pnb Building (Pittsburgh)
  • Point Breeze Gas Works (Philadelphia)
  • Point Breeze Refinery (Philadelphia)
  • Pollock School (Philadelphia)
  • Pope Tin Plate Company (Pittsburgh)
  • Porter Building (Pittsburgh)
  • Porter Company H K (Philadelphia)
  • Post Office (Philadelphia)
  • Potlach Paper Mill (Lock Haven)
  • Potomac Water Treatment & Power Plant (Philadelphia)
  • Potter Sons and Company (Philadelphia)
  • Pottsgrove School (Pottstown)
  • Pottstown Hosp. (Pottstown)
  • Pottstown Iron Company (Pottstown)
  • Pottstown Plant (Pottstown)
  • Pottsville Area Middle School (Pottsville)
  • Pottsville Hospital (Pottsville)
  • Pottsville Iron and Steel Company (Pottsville)
  • Pottsville Water Company (Minersville)
  • Pottsville Water Company (Pottsville)
  • Powelton Electric Company (Philadelphia)
  • Powelton Gardens (Philadelphia)
  • Power Atomic Power Station (Shippingport)
  • Power House (Butler)
  • Power Piping Company (Clairton)
  • Powers Weightman Rosengarten Company (Philadelphia)
  • P P & L Office Building (Kingston)
  • P P G Industries Inc (Meadville)
  • Ppl Electric Utilities Corp (Allentown)
  • Precision Grinding Company (Philadelphia)
  • Precision Grinding Wheel (Philadelphia)
  • Precision Products Company (Washington)
  • Presbyterian Church (Bradford)
  • Presbyterian Home For Widows and Single Women (Philadelphia)
  • Presbyterian Hospital (Philadelphia)
  • Pressed Steel Car Company (Allegheny)
  • Pressed Steel Car Company (McKees Rocks)
  • Pressed Steel Car Company (Pittsburgh)
  • Prestolite Battery (Reading)
  • Price H C & Company (Philadelphia)
  • Progressive Manufacturing Company (Philadelphia)
  • Prospect Colliery (Wilkes Barre)
  • Providence Hospital (Beaver Falls)
  • Pubicker Industries (Philadelphia)
  • Publicker Industries, Inc. (Philadelphia)
  • Publickers Distillery (Philadelphia)
  • Public Ledger Building (Philadelphia)
  • Public School (Philadelphia)
  • Public Service Corp of Nj (Philadelphia)
  • Public Service Gas Company (Philadelphia)
  • Publiker Industries (Philadelphia)
  • Pullman Standard Car Manufacturing Company (Butler)
  • Punxsutawney Elementary School (Punxsutawney)
  • Punxsutawney Secondary School (Punxsutawney)
  • Purchasing Department (Pittsburgh)
  • Pure Oil Company (Marcus Hook)
  • Purex Corporation (Bristol)
Q
  • Quaker Boiler Repairing Company (Philadelphia)
  • Quaker Chemical Corporation (Conshohocken)
  • Quaker City Chocolate Company (Philadelphia)
  • Quaker City Dye Works (Philadelphia)
  • Quaker Export Packaging Company, Inc. (Philadelphia)
  • Quaker State Machine Company (Willow Grove)
  • Quaker State Metals Company (Lancaster)
  • Quakertown Brick & Tile Company (Quakertown)
  • Quakertown Electric Department (Quakertown)
  • Quakertown Tractor Company (Quakertown)
  • Queen City Cleaners (Aliquippa)
  • Quickway Inc (Philadelphia)
  • Quint Corp (Erie)
R
  • R. and H. Simon (Easton)
  • R.B. Murray Oakland Arcade Company (Pittsburgh)
  • R.C.A. (Dunmore)
  • R.C.A. Building (Sayre)
  • R. C. A. Victor (Lancaster)
  • R.C. Remmey Division (Philadelphia)
  • R.D. Isaacs and Son (Wilkes Barre)
  • R.D. Wood Building (Philadelphia)
  • R. Heckscher and Sons (Swedeland)
  • R.J. Carey Company (Williamsport)
  • R. K. Laros Silk Company (Bethlehem)
  • R.M. Armstrong (West Chester)
  • Racquet Club East Apts (Levittown)
  • Radio Corp of America Tube Div (Lancaster)
  • Railway Specialties (Bristol)
  • Railway Spring and Manufacturing Company (Pittsburgh)
  • Railway Steel Spring Company (Latrobe)
  • Rainey Wood Coke Corp (Swedeland)
  • Rankin Station (Pittsburgh)
  • Raybestos Manhattan Plant (Manheim)
  • R D Wood (Philadelphia)
  • Reading Company (Reading)
  • Reading Hospital (Reading)
  • Reading Iron Company (Danville)
  • Reading Iron Company (Reading)
  • Reading Iron Works (Reading)
  • Reading Metals Refining Company (Reading)
  • Reading Railroad (Reading)
  • Reading Railroad Company (Philadelphia)
  • Reading Rehabilitation Hospital (Reading)
  • Reading Shale Brick Company (Reading)
  • Reading Transport (Reading)
  • Reading Tube Corp (Reading)
  • Reading Tube Division (Reading)
  • Reading Water Works (Reading)
  • Reading Whitehall Paperwork (Reading)
  • Real Estate Trust Company (Philadelphia)
  • Real Estate Trust Office Building (Philadelphia)
  • Red Lion Plant (Philadelphia)
  • Reed Danville State Hopital (Danville)
  • Reed Electric Company (Philadelphia)
  • Reedsville Power Station (Kittanning)
  • Reese Metal Products Corp (Lancaster)
  • Refractory & Insulation Corp (Port Kennedy)
  • Reichard-Coulston Inc. (Philadelphia)
  • Reichard Coulston (Bethlehem)
  • Reider Brothers (Philadelphia)
  • Reigner and Engle Brewing Company (Philadelphia)
  • Reiners (Pittsburgh)
  • Reisinger Prather Company (Pittsburgh)
  • Reliance Cement Company (Coplay)
  • Reliant Energy Mid Atlantic (Johnstown)
  • Reliant Energy Wholesale Group (New Florence)
  • Reliant Energy Wholesale Group (Shawville)
  • Remington Rand (Montgomery County)
  • Remmey Refractories (Philadelphia)
  • Remmy Division A P Green (Philadelphia)
  • Rennepamp Supply Company (Pittsburgh)
  • Republic I and S Company (Sharon)
  • Republic Iron and Steel Company (Pittsburgh)
  • Republic Iron Works (Pittsburgh)
  • Republic Steel Corporation (Beaver Falls)
  • Research & Development Center (Lancaster)
  • Reynolds Metals Company (Chester)
  • R Hecksher and Sons (Philadelphia)
  • Rhodia Inc (Morrisville)
  • Richard Hecksher and Sons (Swedeland)
  • Richardson Paint Company (Philadelphia)
  • Richmond Power Plant (Philadelphia)
  • Richmond Station (Philadelphia)
  • Richmond Works (Philadelphia)
  • Rico Realty Company (Philadelphia)
  • Rieck Mcjunkin Dairy Company (Pittsburgh)
  • Riggs Distler (Philadelphia)
  • Rilet Stocker Corporation (Philadelphia)
  • Riley Stoker (Cornwell Heights)
  • Riter Conley Manufacturing Company (Pittsburgh)
  • Rittenhouse Apartments (Philadelphia)
  • Rittenhouse C & Son (Quakertown)
  • Rittenhouse Plaza (Philadelphia)
  • Rittman Process Corp (Pittsburgh)
  • Ritz Carlton Hotel (Philadelphia)
  • River Toad (McKees Rocks)
  • Riverview Home For The Aged (Philadelphia)
  • R L Miller (Enola)
  • Roaring Springs Paper Mill (Hollidaysburg)
  • Robert H Foerderer (Philadelphia)
  • Robert Packer Hospital (Sayre)
  • Robert Smith Ale Brewing Company (Philadelphia)
  • Robinson and Rea Manufacturing Company (Pittsburgh)
  • Robinson and Wallace (Philadelphia)
  • Robinson Clay Products Company (Pottstown)
  • Robinson Ventilating Company (Zelienople)
  • Rochester and Pittsburgh Coal and Iron Company (DuBois)
  • Rochester and Pittsburgh Coal and Iron Company (Punxsutawney)
  • Rochez Brothers & Supply Company (Braddock)
  • Rockwell Industries (Reading)
  • Roebling Steel (Levittown)
  • Rohm & Haas Chemical (Bristol)
  • Rohm & Haas Chemical Company (Philadelphia)
  • Rohm and Haas Company (Philadelphia)
  • Rohm Antl Baas Company (Philadelphia)
  • Rolle Manf Company (Lansdale)
  • Roosevelt Hotel (Pittsburgh)
  • Rorborough Chestnut Hill and Morristown Railway Company (Philadelphia)
  • Rorer Group, Inc. (Montgomery County)
  • Rosedale Foundry and Mach Company (Pittsburgh)
  • Rossiter Mc Govern Company (Pittsburgh)
  • Rotoblast (Butler)
  • Round House (Sharpsburg)
  • Roxborough Hospital (Philadelphia)
  • Rubel (Erie)
  • Russian American ManufacturingCompany (Philadelphia)
  • Russian American Manufacturing Company (Pittsburgh)
  • Rust Boiler Company (Midland)
  • Ruth Bennett Project (Chester)
  • Ryder & Richmond Oil Company (Bradford)
S
  • S. Bern Ohio Company (Rouseville)
  • S. Ewart and Company (Pittsburgh)
  • S.F. Whitman Son (Philadelphia)
  • S. Faith and Company (Philadelphia)
  • S. J. Shimer and Sons (Milton)
  • S. Jarvis Adams Company (Midland)
  • S.K.F. Industries (Philadelphia)
  • S. K. F. Plant Addition (Altoona)
  • Sacred Heart Hospital (Allentown)
  • Sacred Heart Hospital (Norristown)
  • Saint Agnes Hospital (Philadelphia)
  • Saint Joseph\’s School (Norristown)
  • Saint Paul\’s Church (Philadelphia)
  • Salem Brosius Inc (Carnegie)
  • Salem Park Townhomes (Mechanicsburg)
  • Salk Hall University of Pittsburgh (Pittsburgh)
  • Sall Geo Metals Company (Philadelphia)
  • Samaritan Hospital (Philadelphia)
  • Sandusky Cement Company (York)
  • Sans Corporation (Erie)
  • Satellite Alloy Corporation (Springdale)
  • Saucon (South Bethlehem)
  • Saucon Plant (Bethlehem)
  • Sauquoit Silk Company (Scranton)
  • Savage Arms Corporation (Philadelphia)
  • Savage Arms Corporation (Sharon)
  • Sayre Electric Company (Sayre)
  • Schaeffer Brewery (Philadelphia)
  • Scheie Eye Hospital (Philadelphia)
  • Schick Inc. (Lancaster)
  • Schmidt and Ault Paper Company (York)
  • Schmidt Lumber Millwork (Scranton)
  • Schoeneck Farms Inc. (Nazareth)
  • Schoen Pressed Steel Company (Allegheny City)
  • Schoen Steel Wheel Company (McKees Rocks)
  • Schoen Steel Wheel Company (Pittsburgh)
  • School District of City Altoona (Altoona)
  • School District of Philadelphia (Philadelphia)
  • Schooley Colliery (Dunmore)
  • Schulylkill Station (Philadelphia)
  • Schutte & Koerting (Cornwell Heights)
  • Schutte and Koerting Company (Philadelphia)
  • Schuylkill Arsenal Property (Philadelphia)
  • Schuylkill Forge Company (Cornwell Heights)
  • Schuylkill Forge Company (Philadelphia)
  • Schuylkill Station (Philadelphia)
  • Schuylkill Station (Philadelphia)
  • Schuylkill Valley Trac Company (Philadelphia)
  • Scofield, Mason and Company (Philadelphia)
  • Scofield Engineering Company (Philadelphia)
  • Scott Colliery (Mount Carmel)
  • Scottdale Iron and Steel Company (Scottdale)
  • Scottdale Wood Products Company (Scottdale)
  • Scott Foam (Eddystone)
  • Scott Paper Company (Chester)
  • Scott Paper Company (Eddystone)
  • Scott Paper Company (Essington)
  • Scott Paper Company (Philadelphia)
  • Scranton Anthracite Briguette Company (Scranton)
  • Scranton Axle and Spring Company (Scranton)
  • Scranton Bolt and Nut Company (Scranton)
  • Scranton Electric Company (Pittston)
  • Scranton Electric Construction Company (Scranton)
  • Scranton Gas and Water Company (Scranton)
  • Scranton High School (Scranton)
  • Scranton Lace Company (Scranton)
  • Scranton Ordinance Division (Scranton)
  • Scranton Railway Company (Scranton)
  • Scranton Tech. High School (Scranton)
  • Seaboard Container Corporation (Bristol)
  • Seaboard Steel and Manganese Corp (Temple)
  • Sealtest Foods (Philadelphia)
  • Sears (Pittsburgh)
  • Sears, Roebuck and Company (Philadelphia)
  • Sears Roebuck Company (Allentown)
  • Sears Roebuck Store (Reading)
  • Second National Bank (Pittsburgh)
  • Selden Company (Bridgeville)
  • Semet Solvay Company (Johnstown)
  • Senior High School Building (Philadelphia)
  • Septa (Philadelphia)
  • Seranton Lace Curtain Company (Scranton)
  • Sewage Disposal Plant (Philadelphia)
  • Seward Power Plant (Johnstown)
  • Seward Public School (Seward)
  • S Faith Company (Philadelphia)
  • Sfk Industries, Inc. (Philadelphia)
  • Shady Grove School (Montgomery County)
  • Shallcross School (Philadelphia)
  • Shamokin and Coal Township Light, Heat and Power Company (Shamokin)
  • Shamokin Light Heat and Power Company (Shamokin)
  • Shanago Steel (Pittsburgh)
  • Sharon Coke Company (Masontown)
  • Sharon Coke Company (Pittsburgh)
  • Sharon Coke Company (Sharon)
  • Sharon Iron Company (Sharon)
  • Sharon Steel Company (Sharon)
  • Sharon Steel Corporation (Farrell)
  • Sharon Steel Hook Company (Sharon)
  • Sharon Steel Hoop Company (Pittsburgh)
  • Sharon Tube (Sharon)
  • Sharon Water Works Company (Sharon)
  • Sharpless and Sons (Philadelphia)
  • Sharpsville Furnace Company (Sharpsville)
  • Shawville Power Station (Clearfield)
  • Sheeling Pittsburgh Steel (Allenport)
  • Sheetmetal Workers Union – Local 19 (Philadelphia)
  • Shelbe and Fisher (Philadelphia)
  • Shelby Steel Tube Company (Ellwood City)
  • Shelby Steel Tube Company (Greenville)
  • Shellby Steel Tube Company (Pittsburgh)
  • Shelly Brothers Inc. (Lansdale)
  • Shelocta Power Station (Shelocta)
  • Shenango China Company (New Castle)
  • Shenango Furnace Company (Sharpsville)
  • Shenango Inc. (Pittsburgh)
  • Shenango Steel (Neville Island [Neville Township])
  • Shenango Steel (Sharpsville)
  • Shenango Valley Steel Company (New Castle)
  • Shenango Valley Water Company (Sharon)
  • Sherwood Refining Company, Inc. (Warren)
  • Shipman Coal Company (Shamokin)
  • Shipping Atomic Power Station (McKees Rocks)
  • Shippingport Nuclear Power Station (Shippingport)
  • Shipyard Philadelphia (Philadelphia)
  • Shoenberger Steel Company (Pittsburgh)
  • Shoenberger Works (Pittsburgh)
  • Shook Anderson Manufacturing Company (Pittsburgh)
  • Shuanberger Steel Company (Pittsburgh)
  • Shwartz Paper Mill (Philadelphia)
  • Signal Oil & Gas Company (Marcus Hook)
  • Silverbrook Coal Company (Mauch Chunk)
  • Simonds Abrasive (Philadelphia)
  • Simon Gratz High School (Philadelphia)
  • Simonim Oil Company (Philadelphia)
  • Simpson and Watkins (Carbondale)
  • Simpson and Watkins (Scranton)
  • Simpson and Watkins (Seranton)
  • Simpson and Watkins (Wyoming)
  • Sinclair Koppers Company (Kobuta)
  • Sinclair Koppers Company (Monaca)
  • Sinclair Refining Company (Marcus Hook)
  • Sinclair Refining Company (Philadelphia)
  • Singer Ice Company (McKees Rocks)
  • Singer Nirmick Plant (Pittsburgh)
  • Sisters of The Good Shepherd (Philadelphia)
  • Sisters of The Good Shepherd (Scranton)
  • Skating Rink (Bethlehem)
  • Skf Ball Bearing (Philadelphia)
  • Skf Industries (Philadelphia)
  • Skin & Cancer Clinic (McKees Rocks)
  • Skinner Engine Company (Erie)
  • Smith Brothers Iron Works (Philadelphia)
  • Smithfield St Terminal (Pittsburgh)
  • Smith Kline & French (Conshohocken)
  • Smith Kline & French (Philadelphia)
  • Smith Kline & French (Swedeland)
  • Smoketown Elementary School (Lancaster)
  • S Morgan Smith Company (York)
  • S M S Automotive (Philadelphia)
  • Snellenburg Building (Philadelphia)
  • Social Security Building (Philadelphia)
  • Solis-Cohen (Philadelphia)
  • Somerset Coal Company (Boswell)
  • Somerset Mills (Philadelphia)
  • Somerset Smokeless Coal Company (Boswell)
  • Sonneborn Div (Petrolia)
  • Southern Cambria St. Railway Company (Johnstown)
  • Southern Kraft Div Int\’L Paper Company (York Haven)
  • Southern Manual Training School (Philadelphia)
  • Southern Natural Gas Company (Pittsburgh)
  • Southern Traction Company (Pittsburgh)
  • South Hills High School (Pittsburgh)
  • Southmark Mills Company (Philadelphia)
  • South Penn Oil Company (Rouseville)
  • South Philadelphia High School (Philadelphia)
  • South Pittsburgh Water Works (Pittsburgh)
  • South Ride (Pittsburgh)
  • South Side Plant (Pittsburgh)
  • Southside Works (Pittsburgh)
  • Southwark Foundry and Machine Company (Philadelphia)
  • Southwark Station (Philadelphia)
  • Southwest Water Company (Connellsville)
  • Spang Chalfant and Company Inc. (Pittsburgh)
  • Spang Chalfant and Company Inc. (Sharpsburg)
  • Spang Steel and Iron Company (Pittsburgh)
  • Spaug Chalfaut and Company (Etna)
  • Spearman Iron Company (Sharpsville)
  • Spector Freight System (Philadelphia)
  • Spectrum (Philadelphia)
  • Speer Carbon Company (Bradford)
  • Speer Resistor Division (Bradford)
  • Spicer Manufacturing Company (Pottstown)
  • Spirax-Sarco Incorporated (Allentown)
  • Spreckels Sugar Refining Company (Philadelphia)
  • Sprenger Brewing Company (Lancaster)
  • Spring Brook Water Supply Company (Scranton)
  • Springdale Powerhouse (Springdale)
  • Springs Cotton Mills (Lancaster)
  • Springwell Foundry (Chester)
  • Ss Bertz Whse (Lancaster)
  • S S Marvin Branch (Pittsburgh)
  • St. Bernard\’s Roman Catholic Church (Pittsburgh)
  • St. Corr Inst At Hungtindon (Huntingdon)
  • St. Francis Hospital (Pittsburgh)
  • St. Francis Hospital (Pittsburgh)
  • St. Hubert\’s Convent (Philadelphia)
  • St. James Activity Building (Pittsburgh)
  • St. James Episcopal Church (Lancaster)
  • St. Joe Lead (Johnstown)
  • St. Joe Resources Company (Monaca)
  • St. John\’s General Hospital (Pittsburgh)
  • St. Joseph Hospital (Lancaster)
  • St. Joseph Lead Company (Monaca)
  • St. Joseph’s Academy (Greensburg)
  • St. Joseph’s Hospital (Reading)
  • St. Louis Plate Glass Company (Pittsburgh)
  • St. Luke’s Hospital (Bethlehem)
  • St. Margaret Hospital (Pittsburgh)
  • St. Margaret’s Hospital (Pittsburgh)
  • St. Marks School (Altoona)
  • St. Mary\’s Laundry (Ardmore)
  • St. Nicholas Building (Pittsburgh)
  • Stagmaier Brewing Company (Wilkes Barre)
  • Staley Starch (Philadelphia)
  • Staley Syrups (Morrisville)
  • Stanbridge Apts (Lansdale)
  • Standard Floor Company (Pittsburgh)
  • Standard Ice Manufacturing Company, (Philadelphia)
  • Standard Life Insurance Blding (Pittsburgh)
  • Standard Oil (Steelton)
  • Standard Oil Company (Philadelphia)
  • Standard Oil Tank (Philadelphia)
  • Standard Plant (Ellwood City)
  • Standard Sanitary Manufacturing Company (New Brighton)
  • Standard Scale and Supply Company (Beaver Falls)
  • Standard Steel Car Company (Butler)
  • Standard Steel Car Company (Pittsburgh)
  • Standard Steel Works (Burnham)
  • Standard Steel Works Company (Philadelphia)
  • Standard Underground Cable Company (Pittsburgh)
  • Stanley G. Flagg and Company (Pottstown)
  • Stanton Colliery (Ashley)
  • Stanwix Heating Plant (Pittsburgh)
  • Star Fire Brick Company (Pittsburgh)
  • Starr Stores Warehouse (Philadelphia)
  • State Hospital For Insane (Norristown)
  • State Office Building, Commonwealth Ave. and Foster St. (Harrisburg)
  • State Teachers College (Clarion)
  • Station J (Tacony)
  • Station \”B\” Works (Philadelphia)
  • Stauffer Chemical Company (Morrisville)
  • St Clair County Gas and Electric Company (Philadelphia)
  • Steam Generator Sales Service (Coatesville)
  • Steel Car Forge Company (Butler)
  • Steel Car Forge Company (Ellwood City)
  • Steele Elementary School (Philadelphia)
  • Steelton and Highspire Railroad Company (Bethlehem)
  • Steel Workers Local 7209 (Wilkes Barre)
  • Stegmaier Brewing Company (Wilkes Barre)
  • Stephen Girard Building (Philadelphia)
  • Sterling Silk Glove Company (Bangor)
  • Stern and Silverman (Philadelphia)
  • Sterrick Creek Coal Company (Scranton)
  • Stevenson Terrace Apartments (Philadelphia)
  • St Joseph Lead Company (Monaca)
  • Stone & Webster Engineering (Williamsport)
  • Stone Canon Cons. Coal Company (Wilkes Barre)
  • Stone Container Corporation (Philadelphia)
  • Stores Department (Beaver Falls)
  • Stratton Motors (Clearfield)
  • Straub Brewing (Pittsburgh)
  • Strawbridge & Clothier (Philadelphia)
  • Strick Trailers (Fairless Hills)
  • Struthers and Wells (Titusville)
  • Struthers Station (Warren)
  • Struthers Well Corp (Warren)
  • Suburan Plant (Scranton)
  • Suburban Rapid Trans. Lt Railway Company (Pittsburgh)
  • Suburban Water Company (Verona)
  • Sugar Apparatus Manufacturing Company (Philadelphia)
  • Sulzberger Junior High (Philadelphia)
  • Summerdale Dye & Fin Inc (Philadelphia)
  • Summit Branch Mining Company (Williamstown)
  • Summit Branch Railroad Company (Wilkes Barre)
  • Summit Branch Railroad Company (Williamstown)
  • Summit Park Apartments (Philadelphia)
  • Sunbeam Equipment Company (Meadville)
  • Sunbury and Northumberland Electric (Sunbury)
  • Sunbury Converting Works (Sunbury)
  • Sunoco Inc Point Breeze (Philadelphia)
  • Sunoco Pennsylvania (Pittsburgh)
  • Sunoco Philadelphia (Philadelphia)
  • Sunoco Refining and Marketing (Marcus Hook)
  • Sun Oil (Chester)
  • Sun Oil Company (Philadelphia)
  • Sun Oil Company Refinery (Marcus Hook)
  • Sun Oil Company Warehouse (Twin Oaks)
  • Sun Oil Plant (Marcus Hook)
  • Sun Petroleum Company (Marcus Hook)
  • Sun Refining & Marketing Company (Philadelphia)
  • Sun Shipbuilding & Drydock Company (Chester)
  • Sun Shipbuilding and Drydock Company (Philadelphia)
  • Sun Transport Company (Chester)
  • Superintendent U.S. Mint (Philadelphia)
  • Superior Drawn Steel Company (Monaca)
  • Superior Steel Corporation (Carnegie)
  • Superior Thread & Yarn Company (Philadelphia)
  • Superior Zinc Corp (Bristol)
  • Surpass Leather Company (Philadelphia)
  • Susquehanna Coal Company (Nanticoke)
  • Susquehanna Collieries Company (Mount Carmel)
  • Susquehanna Power Station (Shawville)
  • Susquehanna Silk Mills (Sunbury)
  • Swees Steel Company (Williamsburg)
  • Sweet’s Steel (Williamsport)
  • Swift and Company (Chambersburg)
  • Swindell-Dressler Company (Pittsburgh)
  • Swing and Bateman (Philadelphia)
  • Sylvania Elec Prod Inc (Warren)
  • Sylvania Electric Product (York)
  • Syntex Corporation (Allentown)
  • Synthane Corporation (Oaks)
T
  • T.C. Roberts and Company (Philadelphia)
  • Tacony Ordnance Corporation (Tacony)
  • Talco Metals Company (Philadelphia)
  • Tarentum Light and Water Plant (Tarentum)
  • Tarentum Light Plant (Tarentum)
  • Tarentum Paper Mills (Tarentum)
  • Tasty Baking Company (Philadelphia)
  • Tate Jones and Company Inc. (Pittsburgh)
  • Tate Jones Company (Beaver Falls)
  • Taws and Hartman (Philadelphia)
  • Taylor Forge & Pipe Works (Carnegie)
  • Taylor Wharton Iron and Steel Company (Easton)
  • Tech Food Products Company (Pittsburgh)
  • Temple Boiler (Philadelphia)
  • Temple Covenant of Peace (Easton)
  • Temple Furnace (Temple)
  • Temple Hospital (Philadelphia)
  • Temple Iron Company (Reading)
  • Temple Iron Company (Scranton)
  • Temple Iron Company (Temple)
  • Temple Iron Company (Wyoming)
  • Temple University (Philadelphia)
  • Temple University Hospital (Philadelphia)
  • Tere Woodring and Company (Hazleton)
  • Tetzner Dyeing Company (Philadelphia)
  • Texas Company (Marcus Hook)
  • Textile Machine Works (Reading)
  • Thaddeus Stevens Industrial School (Lancaster)
  • Thalheimer Brothers Inc (Philadelphia)
  • The American Pulley Company (Philadelphia)
  • Theater Workers Union – Local 8 (Philadelphia)
  • The Budd Company (Philadelphia)
  • Theodore E. Moser (Philadelphia)
  • Thermal Engineering, Incorporated (Allentown)
  • Thermal Refractories Company (Chester)
  • Thermal Transfer Corp (Monroeville)
  • Thomas Dolan and Company (Philadelphia)
  • Thomas Haywood (Chester)
  • Thomas Jaggers (Philadelphia)
  • Thomas Jefferson University Hospital (Philadelphia)
  • Thomas May Pierce School (Philadelphia)
  • Thomas Textile (Philadelphia)
  • Thompson & Sons (Pittsburgh)
  • Thompson Brothers (Philadelphia)
  • Thos. A. Edison Edison and Illuminating Company (Shamokin)
  • Thos. Wolstenholme Sons & Company (Philadelphia)
  • Thos Dolan and Company (Philadelphia)
  • Thos E Lutner (Philadelphia)
  • Three Mile Island (Londonderry Township)
  • Three Mile Island Nuclear Plant (Middletown)
  • Thro.’ Chas. McCaul Company (Philadelphia)
  • Thro’ American Gas and Electic Company (Philadelphia)
  • Thro’ Central Poor District of Luzerne Company (Wilkes Barre)
  • Tidewater Pipe Line Company (Bradford)
  • Tidewater Steel Company (Chester)
  • Tilden Junior High (Philadelphia)
  • Tin Mill (Aliquippa)
  • Tioga Coal Company (Wilkes Barre)
  • Titus Powerhouse (Reading)
  • Titusville Iron Works (Titusville)
  • Toolmatic Company (Zelienople)
  • Tosco Refining Company (Trainer)
  • Tower Hill Connellsville Coke Company (Uniontown)
  • Townsend Company (New Brighton)
  • Township Light and Power Company (Shamokin)
  • Township of Annville (Annville)
  • Trade & Convention Center (Philadelphia)
  • Trailmobile Manufacturing Company (Philadelphia)
  • Treadwell Construction Company (Midland)
  • Tremont Laundry Company (Philadelphia)
  • Trent, Inc. (Philadelphia)
  • Trexler Farms (Allentown)
  • Trinity Middle School (Washington)
  • Tri State Non Ferrous Company (Quakertown)
  • Troy Jack (Huntingdon)
  • Truck Station 70 (Pittsburgh)
  • Truesdale Colliery (Nanticoke)
  • Truesdale Colly (Plymouth)
  • Tru Knit Industries (Philadelphia)
  • Trw Inc. (Harrisburg)
  • Tubalas Products Div (Beaver Falls)
  • Tube City Brewing Company (McKeesport)
  • Tub Prod (Koppel)
  • Turner and Serrel (Philadelphia)
  • Turtle Creek Valley Water Company (Pittsburgh)
  • Tuscarora Oil Company, Ltd. (Harrisburg)
  • Tygart Glass (Washington)
  • Tyler Charcoal Iron Tin Mills (Washington)
  • Tyler School of Fine Art (Philadelphia)
  • Tyler Tube and Pipe Company (Washington)
  • Tyrone Iron Company (Harrisburg)
  • Tyson Metal Products (Pittsburgh)
U
  • U.G.I.Company (Philadelphia)
  • U.S. Army Reserve (Pittsburgh)
  • U. S. Army Reserve Center (Pittsburgh)
  • U. S. Bureau of Mines
  • U. S. Bureau of Mines (Pittsburgh)
  • U. S. Bureau of Mines (Swedeland)
  • U.S. Government Suppy Depot (Philadelphia)
  • U. S. Hoffman Machinery (Scranton)
  • U.S. Hoffman Machinery Corporation (Pittsburgh)
  • U.S. Post Office (Philadelphia)
  • U. S. Steel (Philadelphia)
  • U.S. Steel (Rankin)
  • U. S. Steel Chemical Plant (Pittsburgh)
  • U. S. Steel Corporation (Ambridge)
  • U. S. Steel Corporation (Berwyn)
  • U. S. Steel Corporation (Fairless)
  • U. S. Steel Corporation (Fairless Hills)
  • U. S. Steel Corporation (Irvin)
  • U. S. Steel Corporation (Johnstown)
  • U. S. Steel Corporation (McKeesport)
  • U. S. Steel Corporation (McKees Rocks)
  • U.S. Steel Corporation (Morrisville)
  • U. S. Steel Corporation (Munhall)
  • U.S. Steel Corporation (Pittsburgh)
  • U. S. Steel Corporation (Vandergrift)
  • U. S. Steel Corporation (West Chester)
  • U. S. Steel Urban Works (McKees Rocks)
  • Ugi Building (Philadelphia)
  • Ukranian Cathedral (Chester)
  • Underground (McKees Rocks)
  • Underwood Coal Company (Scranton)
  • Union Carbide & Carbon Chemical Corporation (Duquesne)
  • Union Carbide Corporation (Harrisburg)
  • Union Coal Company (Mount Carmel)
  • Union Coal Company (Shamokin)
  • Union Coal Company Scott Colliery (Mount Carmel)
  • Union Coal Company Scott Shaft (Mount Carmel)
  • Union Dish Company (Bradford)
  • Union Drawn Steel Company (Beaver Falls)
  • Union Electric Company (Pittsburgh)
  • Union Electric Steel Company (Carnegie)
  • Union Ice Company (Pittsburgh)
  • Union Iron Works (Erie)
  • Union League Club (Philadelphia)
  • Union Paving Company (Bridgeport)
  • Union Paving Company (Philadelphia)
  • Union Spring Manufacturing Company (New Kensington)
  • Union Spring Manufacturing Company (Pittsburgh)
  • Union Station (Pittsburgh)
  • Union Steel Casting (Pittsburgh)
  • Union Steel Company (Donora)
  • Union Steel Company (Pittsburgh)
  • Uniontown Hospital (Uniontown)
  • Uniontown Senior High School (Uniontown)
  • Union Traction Company (Philadelphia)
  • Uniroyal Rubber Company (Philadelphia)
  • United Church of Christ (Bethlehem)
  • United Container Corp (Philadelphia)
  • United Electric Company of America (Philadelphia)
  • United Engine and Foundry Company (Pittsburgh)
  • United Engineering & Foundry Company (Homestead)
  • United Engineering & Foundry Company (New Castle)
  • United Engineering & Foundry Company (Pittsburgh)
  • United Engineering & Foundry Company (Titusville)
  • United Engineering and Foundry Company (Vandergrift)
  • United Fraction Company (Pittsburgh)
  • United Gas Imp Company (Germantown)
  • United Gas Improvement (Allentown)
  • United Gas Improvement Company (Philadelphia)
  • United Gas Improvement Company (Steelton)
  • United Gas Improvement Company (Wayne)
  • United Refining Company (Warren)
  • United Roofing and Manufacturing Company (Marcus Hook)
  • United States Aluminum of America (Pittsburgh)
  • United States Asbestos Company (Manheim)
  • United States Coal and Coke Company (Pittsburgh)
  • United States Department of Commerce Bureau of Mines Exp. Stn. (Pittsburgh)
  • United States Mint (Philadelphia)
  • United States Naval Hospital (Philadelphia)
  • United States Pipe and Foundry Company (Scottdale)
  • United States Sanitary Manufacturing Company (Monaca)
  • United States Steel (Donora)
  • United States Steel (Ellwood City)
  • United States Steel Corp (Ambridge)
  • United States Steel Corporation (Braddock)
  • United States Steel Corporation (Clairton)
  • United States Steel Corporation (Duquesne)
  • United States Steel Corporation (Homestead)
  • United States Steel Corporation (Monroeville)
  • United States Steel Corporation (Neville Island [Neville Township])
  • United States Steel Corporation (Pittsburgh)
  • United Steel and Wire (Wilkes Barre)
  • United Steel Barrell (Philadelphia)
  • United Traction Company (Pittsburgh)
  • Unit Rail Anchor Corp (Pittsburgh)
  • Universal-Rundle Corporation (New Castle)
  • Universal Atlas Cement (Northampton)
  • Universal Cyclops (Bridgeville)
  • Universal Cyclops Corp (Pittsburgh)
  • Universal Cyclops Steel Mill (Titusville)
  • Universal Dye Works (Philadelphia)
  • Universal Elec. & Manufacturing. Company (Johnstown)
  • Universal Oil Products (Bradford)
  • Universal Rubber Products Company (Zelienople)
  • Universal Werehouse (Philadelphia)
  • University City High School (Philadelphia)
  • University Club (Philadelphia)
  • University of Pennsylvania (Indiana)
  • University of Pennsylvania (Philadelphia)
  • University of Pennsylvania Hospital (Philadelphia)
  • University of Pennsylvania Hyperbarric Test Complex (Philadelphia)
  • University of Pittsburgh (Pittsburgh)
  • University Square Condominiums (Pittsburgh)
  • US Aluminum Company (New Kensington)
  • US Army Reserve Center (Reading)
  • US Army Supply Base (Philadelphia)
  • Us Army War College – Carlisle Barracks (Carlisle)
  • US Asbestos (Manheim)
  • US Courthouse (Philadelphia)
  • US Dept of Agriculture (Philadelphia)
  • US Electric Illuminating Company (Philadelphia)
  • US Mint (Philadelphia)
  • US Navy Yard (Philadelphia)
  • US Post Office (Philadelphia)
  • US Sanitary Manufacturing. (Monaca)
  • US Steel Corp (Pittsburgh)
  • US Steel Mill (Morrisville)
  • US Veterans Administration (Altoona)
  • USX Corporation (Pittsburgh)
  • USX Irving Works (Pittsburgh)
  • USX Steel Mill (Brackenridge)
  • USX Steel Mill (Clairton)
  • USX Steel Mill (Fairless Hills)
  • USX Steel Mill (Pittsburgh)
V
  • V.L. Cavannas Company (Philadelphia)
  • Valley Electric Company (New Brighton)
  • Valley Forge Hospital (Willow Grove)
  • Valley Ice Company (Beaver Falls)
  • Valley Mill (Coplay)
  • Valley Mould and Iron Company (Sharpsville)
  • Valley Traction Company (Bridgeport)
  • Vanadium Alloy Steel Company (Latrobe)
  • Vanadium Alloy Steel Company (Monaca)
  • Vandegrift Constn. Company (Philadelphia)
  • Vandergrift Electric Light and Power Company (Vandergrift)
  • Vandergrift Land and Improvement Company (Vandergrift)
  • Van Dorn Company Heat Tre (McKees Rocks)
  • Van Horn Ely (New Brighton)
  • Vare Junior High School (Philadelphia)
  • Vasco (Latrobe)
  • Vaugh Sanitary Bakery (Berwick)
  • Vciticorp Venture Capital (Latrobe)
  • Vernon Textile Company (Philadelphia)
  • Vertal Division (Eddystone)
  • Vertol Div Boeing Company (Eddystone)
  • Vesta Coal Company (Allenport)
  • Vesta Coal Company (Pittsburgh)
  • Vesuvios Crucible Company (Pittsburgh)
  • Vesuvius Crucible Company (Pittsburgh)
  • Veterans Administration Hospital (Coatesville)
  • Veterans Administration Hospital (Pittsburgh)
  • Veterans Hospital (Altoona)
  • Veterans Hospital (Philadelphia)
  • Veterans Stadium (Philadelphia)
  • Vick Manufacturing Division (Philadelphia)
  • Victor Balata Plant (Easton)
  • Victor Barward Industries (Philadelphia)
  • Victor Box Company (Quakertown)
  • Victor Chemical Works (Morrisville)
  • Visco Company (Marcus Hook)
  • Viscose Company (Marcus Hook)
  • Viscose Company (Meadville)
  • Vitro (Canonsburg)
  • Vtasty Baking Company Inc (Philadelphia)
  • Vulcan Detinning Company (Neville Island [Neville Township])
  • Vulcan Foundry and Machine Company (New Castle)
  • Vulcanite Paving Company (Philadelphia)
  • Vulcan Mold (Latrobe)
  • Vulvanized Rubber & Plastics Company (Morrisville)
W
  • W.C. Hamilton and Sons (Philadelphia)
  • W.F: Mosser and Son (Allentown)
  • W. G. Balph Company (Pittsburgh)
  • W.G. Wilkins Company (Pittsburgh)
  • W. H. Piper and Company (Philadelphia)
  • W. J. Hollis (Reading)
  • W. J. Lawlor (Quakertown)
  • W. J. Mccahan Sug. Refining Company (Philadelphia)
  • W.J. Mccahan Sugar Refining and Molasses Company (Philadelphia)
  • W.J. Rainey Company (Connellsville)
  • W.M. Anderson (Philadelphia)
  • W.P.O Rr (Philadelphia)
  • Wabash Pittsburgh Terml (Pittsburgh)
  • Wabash Pitts Railroad Powerhouse (Pittsburgh)
  • Wager and Cox (Bridgeport)
  • Walker and Keplar (Philadelphia)
  • Wall & Shand, Duke and Vine Sts. (Lancaster)
  • Wanamaker Garage (Philadelphia)
  • Wanamie Colliery (Wanamie)
  • War College (Carlisle)
  • Warden Frew and Company (Philadelphia)
  • Wark Army Supply (Philadelphia)
  • Warner Company (Bellefonte)
  • Warner Company (Philadelphia)
  • Warren Light and Power Company (Warren)
  • Warren Power Plant (Warren)
  • Warwick Iron and Steel Company (Pottstown)
  • Wash. Ave Plant (Scranton)
  • Washburn, Williams and Company (Seranton)
  • Washburn and Zerfass (Scranton)
  • Washington Candc Company (Uniontown)
  • Washington Hospital (Washington)
  • Washington Ice Company (Washington)
  • Washington Jefferson College (Washington)
  • Washington Powerhouse (Danville)
  • Washington Tin Plate Company (Washington)
  • Washington Tool & Machine Company (Washington)
  • Washingtonville Power Plant (Washingtonville)
  • Water Works Constr. Company (Pittsburgh)
  • Water Works Northeast (Philadelphia)
  • Water Works Southeast (Philadelphia)
  • Water Works Southwest (Philadelphia)
  • Wayne Constn Company (Greensburg)
  • Wayne Crouse, Inc. (Butler)
  • Wayne Iron Works (Pittsburgh)
  • W C Hamilton and Son (Philadelphia)
  • W Devees Wood Company (Pittsburgh)
  • W Dewees Wood Department (McKeesport)
  • Weathercraft Insulation Company (Philadelphia)
  • Weatherspoong Building (Philadelphia)
  • Webster Coal and Coke Company (Philadelphia)
  • Webster Coal and Coke Company (Scranton)
  • Webster Furnace (Philadelphia)
  • Weeks Brothers (Pittsburgh)
  • Weightman Building (Philadelphia)
  • Weightman Estate (Philadelphia)
  • Weinberg Louis and Marion (Philadelphia)
  • Weirton Steel (McKees Rocks)
  • Welding Engineers (Norristown)
  • Wellman – Seaver Morgan Company (Erie)
  • Wertz Engineering Company (Allentown)
  • Wessell Hardware Corporation (Philadelphia)
  • West. Virginia Plate Glass Company (Pittsburgh)
  • West Chester Laundry (West Chester)
  • West Chester University (West Chester)
  • West End Coal Company (Seranton)
  • West End Heating and Energy Company (Philadelphia)
  • West End Rolling Mill Company (Lebanon)
  • Westerly Parkway School (State College)
  • Western Electric Company (King of Prussia)
  • Western Electric Company, Inc. (Allentown)
  • Western Electric Company Inc. (Reading)
  • Western Electric Corporation (Beaver)
  • Western Metal Bed Company (Philadelphia)
  • Western Penitentiary of Pennsylvania (Allegheny)
  • Western Penna Hospital (Pittsburgh)
  • Western State Psychiatric Hospital (Pittsburgh)
  • Westinghouse (Pittsburgh)
  • Westinghouse (Shippingport)
  • Westinghouse-East (Pittsburgh)
  • Westinghouse Aed Building Addn (Cheswick)
  • Westinghouse Air Brake Company (Allegheny)
  • Westinghouse Air Brake Company (Pittsburgh)
  • Westinghouse Air Brake Company (Wilmerding)
  • Westinghouse Betis (East Pittsburgh)
  • Westinghouse Betis (West Mifflin)
  • Westinghouse Electric & Manufacturing Company (East Pittsburgh)
  • Westinghouse Electric & Manufacturing Company (Irwin)
  • Westinghouse Electric & Manufacturing Company (Philadelphia)
  • Westinghouse Electric & Manufacturing Company (Pittsburgh)
  • Westinghouse Electric and Manufacturing Company (Allegheny)
  • Westinghouse Electric and Manufacturing Company (Essington)
  • Westinghouse Electric Company (Cheswick)
  • Westinghouse Electric Company (Elrama)
  • Westinghouse Electric Company (Homestead)
  • Westinghouse Electric Company (Large)
  • Westinghouse Electric Company (McKees Rocks)
  • Westinghouse Electric Company (West Mifflin)
  • Westinghouse Electric Company (York Haven)
  • Westinghouse Electric Corp (East Pittsburgh)
  • Westinghouse Electric Corp (Lester)
  • Westinghouse Electric Corp (Pittsburgh)
  • Westinghouse Electric Corp (Sharon)
  • Westinghouse Electric Corporation (Beaver)
  • Westinghouse Electric Corporation (Elderton)
  • Westinghouse Electric Corporation (Philadelphia)
  • Westinghouse Electric Corporation (Shelocta)
  • Westinghouse General Electric and Manufacturing Company (Pittsburgh)
  • Westinghouse Machine Company (East Pittsburgh)
  • Westinghouse Machine Company (Pittsburgh)
  • Westinghouse Power Division (Large)
  • Westinghouse Steam Division (Lester)
  • Westmoreland Coal Company (Irvin)
  • Westmoreland Coal Company (Irwin)
  • Westmoreland County Home For The Destitute (Greensburg)
  • West Park Hospital (Philadelphia)
  • West Penn Hospital (Pittsburgh)
  • West Penn Power Company (Courtney)
  • West Penn Power Company (Kittanning)
  • West Penn Power Company (Pittsburgh)
  • West Penn Power Company (Reesedale)
  • West Pennsylvania Hospital (Pittsburgh)
  • West Pennsylvania Power Company (Cheswick)
  • West Pennsylvania Power Company (Connellsville)
  • West Pennsylvania Power Company (Courtney)
  • West Pennsylvania Power Company (Monongahela)
  • West Pennsylvania Power Company (Springdale)
  • West Pennsylvania Traction Company (Butler)
  • West Pennsylvania Traction Company (Connellsville)
  • West Philadelphia City High School (Philadelphia)
  • West Philadelphia Works (Philadelphia)
  • Westside Osteopathic Hospital (York)
  • Westvaco (Williamsburg)
  • Westvaco Corporation (Tyrone)
  • Westvaco Pulp and Paper (Tyrone)
  • West Virginia Pulp & Paper Company (Tyrone)
  • West Virginia Pulp and Paper Company (Williamsburg)
  • Weyeth Laboratories, Inc. (West Chester)
  • W G Payne and Company (Kingston)
  • W G Pennypacker (Philadelphia)
  • Wh Cars and Company (Philadelphia)
  • Wheelabrator Falls Wte (Morrisville)
  • Wheeling-Pittsburgh Steel Corporation (Allenport)
  • Wheeling-Pittsburgh Steel Corporation (Monessen)
  • Wheelwright and Mudge (York)
  • Whitehall Cement Company (Annville)
  • Whitemarsh Township (Montgomery County)
  • White Pigment Corp (King of Prussia)
  • Whiting Corporation (Erie)
  • Whitman Chocolate (Philadelphia)
  • W H Luden (Reading)
  • Widener Building (Philadelphia)
  • Widener University (Chester)
  • Wiegner Smelting Company (Philadelphia)
  • Wilbur Chocolate Company (Philadelphia)
  • Wildman & Schwartz (Norristown)
  • Wildman Jacquard Company (Norristown)
  • Wilkes Barre Anthracite Coal Company (Wilkes Barre)
  • Wilkes Barre College (Wilkes Barre)
  • Wilkes Barre Company (Wilkes Barre)
  • Wilkes Barre Electric Light Company (Wilkes Barre)
  • Wilkes Barre Gas and Electric Company (Wilkes Barre)
  • Wilkesbarre Railway Company (Wilkes Barre)
  • Wilkes Barre Steam Heat Company (Wilkes Barre)
  • Wilkes College (Kingston)
  • Wilkinsburg and East Pittsburg Railroad (Pittsburgh)
  • Wilkinsburg Electric Company (Wilkinsburg)
  • Wilkinsburg High School (Wilkinsburg)
  • Wilkinson and E. Pittsburgh St. Railway Company (Rankin)
  • Willamette Industries (Johnsonburg)
  • William Armstrong & Sons (Conshohocken)
  • William Armstrong & Sons (Germantown)
  • William Armstrong & Sons (Philadelphia)
  • William Cramp and Sons (Philadelphia)
  • William Galloway (Philadelphia)
  • William J. Cramp Elementary (Philadelphia)
  • William J. Mimm Lancaster Floor Plant (Lancaster)
  • William Mann Company (Philadelphia)
  • William Penn Hotel (Pittsburgh)
  • Williamsburg Generating Station (Williamsburg)
  • Williamson Brothers Company (Philadelphia)
  • Williamsport Powerhouse (Williamsport)
  • Williamsport Technical Institute (Williamsport)
  • William Weightman (Philadelphia)
  • Willowbrook North 3 (Plymouth Meeting)
  • Willow Grove Naval Air Station (Willow Grove)
  • Willson Products Division (Reading)
  • Wilputte Coke Oven (Philadelphia)
  • Wilson & Company (Sunbury)
  • Wilson and Company Inc (Philadelphia)
  • Wilson Fitzgibbons Oil Company (Bradford)
  • Wilson H. Brown Inc. (Germantown)
  • Wilson Martin Company (Philadelphia)
  • Wilson Safety Products (Reading)
  • Wilson Snyder Cent. Pump Company (Pittsburgh)
  • Windber Electric Company (Windber)
  • Winter Brewery (Pittsburgh)
  • Wire Mill (Johnstown)
  • Wirtz A H Inc (Chester)
  • Wise (Kingston)
  • Wise Delicatessen Company (Berwick)
  • Wise Foods Inc (Berwick)
  • Wise Potatoe Chip Company (Berwick)
  • Wishart Theatre (Philadelphia)
  • Witco Chemical Corp (Petrolia)
  • Witco Chemical Corporation (Bradford)
  • Witco Corporation (Petrolia)
  • Wm. Cramp and Sons (Philadelphia)
  • Wm. H. Grundy and Company (Bristol)
  • Wm. H. Taylor and Company (Allentown)
  • Wm. Miller and Sons Company (Pittsburgh)
  • Wm. Penn High School (Philadelphia)
  • Wm. Weightman (Philadelphia)
  • Wm. Whitaker and Sons. (Philadelphia)
  • Wm Cramp and Sons Ship and Engine Building. Company (Philadelphia)
  • Wm F Forepaugh Jr and Bro. (Philadelphia)
  • W M H Rorer Company (Fort Washington)
  • Wm Krause and Sons Cement Company (Martins Creek)
  • Wm L. Sayre Jr High School (Philadelphia)
  • Wm Leard Company (New Brighton)
  • Wmmann Company (Philadelphia)
  • Wm Penn Hotel (Pittsburgh)
  • Wm Steele Sons Company (Philadelphia)
  • Wm Weightman (Philadelphia)
  • Wm Wharton Jr. Company (Easton)
  • Wm Whitaker 7 Sons (Philadelphia)
  • Wolf Building Company (Philadelphia)
  • Womens Christian Association (Philadelphia)
  • Womens Medical College (Philadelphia)
  • Women’s Medical College Hospital (Philadelphia)
  • Wood, Alan, Steel Company (Conshohocken)
  • Woodbourne Apartment Association (Levittown)
  • Woodings Verona Steel Works (Verona)
  • Wood John Company (Conshohocken)
  • Woodland Fire Brick Company (Woodland)
  • Woodland Fire Bridge Company (Woodland)
  • Woodland Fire Buick Company (Woodland)
  • Woolworth Building (Lancaster)
  • Worth Brothers Company (Coatesville)
  • Wright Brothers and Company (Philadelphia)
  • Wright Elementary School (Altoona)
  • W W Darley (Pittsburgh)
  • Wycoff Steel (Ambridge)
  • Wyeth Labs (Philadelphia)
  • Wyoming Ave and G St. (Philadelphia)
  • Wyoming Engineering Company (Wilkes Barre)
  • Wyoming Valley Electric Light. Heat and Power Company (Wilkes Barre)
Y
  • Yewdall and Jones Brothers (Philadelphia)
  • YMCA (Lansdale)
  • YMCA (Pottstown)
  • YMCA Building (Lancaster)
  • YMHA (Philadelphia)
  • Yoder Industries (York)
  • York City Steam Plant (York)
  • York Corporation (York)
  • York Corrugating Company (York)
  • York Hospital (York)
  • York International Corp (York)
  • York Junior College (York)
  • York Manufacturing Company (York)
  • York Shipley Inc (York)
  • Yorktowne Hotel (York)
  • York Water Company (York)
  • Young Door Company (Sunbury)
  • Young Mens Christian Association. (Philadelphia)
  • Youngstown Sheet & Tube Company (McKees Rocks)
Z
  • Zabel Bros. Company Inc (Philadelphia)
  • Zack Industries (Reading)
  • Zenith Corporation (Lansdale)
  • Zimmerli Gym Lock Haven University (Lock Haven)
  • Zinc Smelting Div (Monaca)
  • Zinman Furs (Philadelphia)
  • Zion Industries (Bradford)
  • Zug Iron and Steel Company (Pittsburgh)
  • Zurn Industries (Erie)

 

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