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US Patent: 872,048
Hand-Operated Tool Single Crank Screwdriver
Patentee: William Broad (exact or similar names) - Beaver Falls, PA USPTO Classifications: 81/177.1, 81/177.4 Tool Categories: screwdrivers : screwdriver mechanisms Assignees: William Broad - Beaver Falls, PA Erastus E. Pierce - New Brighton, PA Charles A. White - New Brighton, PA Manufacturer: Adbro Mfg. Co. - Pittsburgh, PA Witnesses: E. E. Pierce Charles W. Bradshaw	Patent Dates: Applied: Feb. 23, 1907 Granted: Nov. 26, 1907 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin
Description: The tools covered by this patent are intended to allow one handed operation by electricians, mechanics, carpenters, etc.

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