Motor operated drill
United States Patent 2730332
US Patent References:
/RE22382.html
- - RE22382

Cord retriever
- - 1936463


Inventors:
Hale, Ralph F.
Publication Date:
01/10/1956
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Assignee:
JOY MFG CO
Primary Class:
173/147
Other Classes:
242/388.900, 173/159, 175/170
International Classes:
E21B19/084; E21B19/00