71496396
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 CERAMIC BONDED WITH SILICON CARBIDE ABRASIVE GRAINS
Lubricants and Fuels