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US Patent: 977,957
Ratchet Mechanism for Screw-Drivers, &c.
Patentee: George O. Leopold (exact or similar names) - Philadelphia, PA USPTO Classifications: 192/43.1, 74/127 Tool Categories: screwdrivers : screwdriver mechanisms : ratcheting screwdrivers Assignees: North Brothers Manufacturing Co. - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: William E. Shupe William A. Barr	Patent Dates: Applied: May 22, 1909 Granted: Dec. 06, 1910 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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