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US Patent: 116,837
Improvement in boring-bits
Patentee:
Daniel Kelly (exact or similar names) - Muskegon, MI

USPTO Classifications:
408/224

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:
Daniel Jamison
Hiram J. Hoyt
Patent Dates:
Granted: Jul. 11, 1871

Patent Pictures:
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Description:
An improvement to the inventor's patent of 1870-05-10.

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