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US Patent: 74,490
Improvement in Screw-Drivers and Boring-Tool Screwdriver and Countersink
Patentee: Jason A. Bidwell (exact or similar names) - East Boston, MA USPTO Classifications: 408/191, 411/910, 411/919, 7/158, 7/165, 81/436 Tool Categories: screwdrivers : screwdriver blades woodworking tools : hand drills : drill bits : countersinks Assignees: None Manufacturer: Not known to have been produced Witnesses: William B. W. Hallett Stephen A. Cooke, Jr.	Patent Dates: Granted: Feb. 18, 1868 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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