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US Patent: 70,923
Improvement in Screw-Drivers
Patentee: T. D. Vorhees (exact or similar names) - Easton, PA USPTO Classifications: 16/431, 43/23, 81/177.1, 81/436 Tool Categories: screwdrivers : screwdriver mechanisms Assignees: None Manufacturer: Not known to have been produced Witnesses: William F. McNamara Alex. F. Roberts	Patent Dates: Granted: Nov. 12, 1867 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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