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US Patent: 1,054,142
Spiral tool-driver
Patentee: Grover Plein (exact or similar names) - Racine, WI USPTO Classifications: 7/138, 7/146, 7/165, 74/127 Tool Categories: screwdrivers : screwdriver mechanisms : spiral screwdrivers Assignees: None Manufacturer: Not known to have been produced Witnesses: Mrs. George E. Dahl Otto Plein	Patent Dates: Applied: Mar. 25, 1909 Granted: Feb. 25, 1913 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin
Description: Combination spiral screwdriver, hammer and wrench. Also see Patent #1107701.

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