| American Dredging | Philadelphia | PA |
| American Dyewood | Chester | PA |
| American Electronics Lab | Colmar | PA |
| American Engineering | Philadelphia | PA |
| American Hardware | Parkesburg | PA |
| American Industrial Contracting | Sewickley | PA |
| American Industrial Contracting | Allison Park | PA |
| American Industrial Contracting | Glenfield | PA |
| American Industrial Contracting | Oil City | PA |
| American Industrial Service | Glenfield | PA |
| American Insulated Wire | New Freedom | PA |
| American Insulation | New Freedom | PA |
| American Iron & Steel | Lebanon | PA |
| American Lace Manufacturing | Germantown | PA |
| American Legion | Pittsburgh | PA |
| American Locomotive | Latrobe | PA |
| American Locomotive | Chester | PA |
| American Locomotive | Allegheny | PA |
| American Machine & Foundry | York | PA |
| American Magnesium | Plymouth Meeting | PA |
| American Olean Tile | Quakertown | PA |
| American Olean Tile | Lansdale | PA |
| American Paper | Lancaster | PA |
| American Pile Fabric | Philadelphia | PA |
| American Pipe Manufacturing | Philadelphia | PA |
| American Radiator & Standard Sanitary | Pittsburgh | PA |
| American Railway | Philadelphia | PA |
| American Road Machine | Kennett Square | PA |
| American Rolling Mill | Butler | PA |
| American Salvage | Philadelphia | PA |
| American Schack | Wexford | PA |
| American Sheet & Tin Plate | Leechburg | PA |
| American Sheet & Tin Plate | Pittsburgh | PA |
| American Sheet & Tin Plate | New Kensington | PA |
| American Sheet & Tin Plate | New Castle | PA |
| American Sheet & Tin Plate | Scottdale | PA |
| American Sheet & Tin Plate | McKeesport | PA |
| American Sheet & Tin Plate | Monessen | PA |
| American Sheet & Tin Plate | Vandergrift | PA |
| American Standard | Trenton | PA |
| American Steel Hoop | Pittsburgh | PA |
| American Steel Hoop | Allegheny | PA |
| American Steel & Wire | Allentown | PA |
| American Steel & Wire | Pittsburgh | PA |
| American Steel & Wire | Rankin | PA |
| American Steel & Wire | Braddock | PA |
| American Steel & Wire | Beaver Falls | PA |
| American Steel & Wire | Donora | PA |
| American Stores | Philadelphia | PA |
| American Street Gobain Glass | Jeannette | PA |
