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US Patent: 193,406
Improvement in augers
Patentee:
David E. Henderson - Leetown, WV

USPTO Classifications:
144/219

Tool Categories:
metalworking machines : drilling and boring : drill bits
woodworking tools : hand drills : drill bits

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Thomas B. Homar
John H. Musgrove

Patent Dates:
Applied: May 04, 1877
Granted: Jul. 24, 1877

Patent Pictures:
USPTO pdf tiff
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