Penn Hills Township, Allegheny County, PA, US
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Patent Grant
United States Steel Corporation
John L. Howell
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Patent Grant
United States Steel Corporation
Jerome Feinman
C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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Patent Grant
United States Steel Corporation
Edward J. Nemeth
C01 - INORGANIC CHEMISTRY
