-
1429791
-
Patent number 1,429,791
-
Issue date Sep 19, 1922
-
C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
-
1340990
-
Patent number 1,340,990
-
Issue date May 25, 1920
-
C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...