Grinding wheel
United States Patent 2238351
Inventors:
Der, Pyl Edward Van
Publication Date:
04/15/1941
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Export Citation:
Assignee:
NORTON CO
Primary Class:
Other Classes:
428/671, 75/243, 75/231, 76/112, 451/541, 51/309, 428/648, 428/676
International Classes:
B24D3/08; B24D3/04