Title:
Method of treating cutter teeth
United States Patent 2407642

Inventors:
Ashworth, Robert W.
Publication Date:
09/17/1946
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Assignee:
HUGHES TOOL CO
Primary Class:
76/108.100
Other Classes:
175/374, 451/33, 451/34, 76/101.100
International Classes:
C23C8/00; E21B10/50; E21B10/46