71496398
Feb 11, 1946
Oct 14, 1947
GRINDING WHEELS [ , RUBBING BRICKS, GRINDING BLOCKS MADE OF ABRASIVE MATERIALS, IN SQUARE, RECTANGULAR, TRIANGULAR, OR ROUND FORM, SEGMENTAL WHEELS, AND STICKS, ALL RESINOID BONDED WITH SILICON CARBIDE ABRASIVE GRAINS ]
Lubricants and Fuels