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US Patent: 841,472
Implement for Driving Screwhooks and Eyes
Patentee: William H Vanderherchien (exact or similar names) - Pennsylvania, PA USPTO Classifications: 279/90, 81/125, 81/901 Tool Categories: screwdrivers : screwdriver blades Assignees: None Manufacturer: Not known to have been produced Witnesses: Whilliam E. Shupe Joseph H. Klien	Patent Dates: Applied: Feb. 17, 1906 Granted: Jan. 15, 1907 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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