Title:
Drill
United States Patent 2237901

Inventors:
Chun, William A.
Publication Date:
04/08/1941
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Assignee:
Chun, William A.
Primary Class:
408/59
Other Classes:
408/223, 408/233, 407/40, 408/227
International Classes:
B23B51/00; B23B51/02; B23B51/10