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US Patent: 219,425
Improvement in Crank Screw-Drivers
Patentee: George Abrams (exact or similar names) - Philadelphia, PA USPTO Classifications: 81/438 Tool Categories: screwdrivers : screwdriver mechanisms Assignees: None Manufacturer: Not known to have been produced Witnesses: Robert A. Brown William J. McHenry	Patent Dates: Applied: Jul. 31, 1879 Granted: Sep. 09, 1879 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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