71661678
Feb 25, 1954
Mar 6, 1956
ALLOYS AND COMMINUTED METAL MIXTURES COMPRISING THE FOLLOWING COMBINATIONS: CAST IRON AND BORIDES; STEEL AND BORIDES; IRON, MANGANESE AND BORIDES; STEEL, TUNGSTEN AND BORIDES; NICKEL AND BORIDES; IRON, NICKEL AND BORIDES; AND COPPER, NICKEL AND BORIDES
Jewelry