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US Patent: 452,772
Screw-driver
Patentee: Walter A. Church (exact or similar names) - Binghamton, NY USPTO Classifications: 74/127 Tool Categories: screwdrivers : screwdriver mechanisms : spiral screwdrivers Assignees: Edward A. Eggert - Buffalo, NY Benjamin F. Watson - Buffalo, NY Manufacturer: Not known to have been produced Witnesses: Everand A. Hayes M. Fillmore Brown	Patent Dates: Applied: Jun. 16, 1890 Granted: May 26, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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