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US Patent: 1,021,538
Gearing
Patentee:
George O. Leopold (exact or similar names) - Philadelphia, PA

USPTO Classifications:
74/366, 81/34

Tool Categories:
woodworking tools : hand drills : eggbeater drills

Assignees:
North Brothers Manufacturing Co. - Philadelphia, PA

Manufacturer:
North Brothers Manufacturing Co. - Philadelphia, PA

Witnesses:
William E. Shupe
William A. Barr
Patent Dates:
Applied: Oct. 19, 1911
Granted: Mar. 26, 1912

Patent Pictures:
Leopold 1,021,538
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward George Langford
Description:
The same goal as Leopold's patent 1,015,235. It may be that the orientation of the shifter on the drill is different.

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