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US Patent: 50,328
Improvement in Screw-Drivers
Patentee: William G. A. Bonwill (exact or similar names) - Dover, DE USPTO Classifications: 408/187, 7/158, 7/165, 7/168 Tool Categories: screwdrivers : screwdriver blades woodworking tools : hand drills : drill bits : countersinks Assignees: None Manufacturer: Not known to have been produced Witnesses: M. M. Livingston C. L. Lopliff	Patent Dates: Granted: Oct. 10, 1865 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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