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US Patent: 977,258
Combined valve grinder and drill
Patentee:
Otis R. Angell (exact or similar names) - Dorchester, MA

USPTO Classifications:
451/117, 74/318, 74/323, 81/34

Tool Categories:
woodworking tools : hand drills : eggbeater drills

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
N. Perry Sipprelle
Walter R. Meins
Patent Dates:
Applied: Jul. 12, 1909
Granted: Nov. 29, 1910

Patent Pictures:
Angell 977,258
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Report data errors or omissions to steward George Langford
Description:
Angell's patent allows for either reciprocal or continuous motion.

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