-
3765474
-
Patent number 3,765,474
-
Issue date Oct 16, 1973
-
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
-
3270379
-
Patent number 3,270,379
-
Issue date Sep 6, 1966
-
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL