To answer the question :
Federal Machine and Welder : plant located in Warren, OH. Closed down in 1963.
Pacific Car and Foundry : Company created at Seattle in 1901, original name was Railway Steel & Supply Company. It manufactured rails, wagons and train equipments. After 1945, PCF stopped to produce railway equipments and built some trucks, and then refrigerated trucks. It closed down in 1984.
Baldwin Locomotive Works : Company created in 1832 under the name Baldwin Vail and Huffy. It started its life producing steam locomotives and rails, and in 1890 it tried to develop a small electric locomotive to be used in mines. Baldwin produced some M3 Lees before assembling Sherman tanks. It was the first company to assemble Sherman hulls by welding. After the war, it merged with Hamilton and Lima LW to become the Baldwin Lima Hamilton Co. , and in 1972 it stopped to produce any rail equipment.
Lima Locomotive Works : created in 1859 to develop steam machines. First company to manufacture the Sherman tank from February 1942, due to its ability to cast the M4A1 hull. Merged with Baldwin to form the Baldwin Lima Hamilton Co., the Lima plant closed its doors in 1980.
ALCO : created on 24 June 1901, gathered smaller companies, including Schenectady Locomotive Works. This company manufactured M3 Lees, M7 Priests, M36 TDs during WW2. It was bought by the Studebaker Worthington Incorporated in 1964. In 1969, Bombardier acquired the assets of ALCO for the locomotive activity, and the motor/engine activity was sold to White Motor Corporation in 1970.
Pullman Standard : created in 1862 ,specialized in the building of high-standard wagons. Assets bought by Bombardier in 1987.
Pressed Steel Car : created in 1895 after the merging of Schoen Pressed Steel Co. and the Fox Pressed Steel Equipment Co.Specialized in the production of wagons, tramways, rails. Bought by US Steel in 1956, the plant closed after 1970.
Fisher : see General Motors http://en.wikipedia.org/wiki/General_Motors
Then we have Ford and Chrysler, and that's it !!
P-O