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US Patent: 979,132
Spiral tool-driver
Patentee: Frank E. Davis (exact or similar names) - Indianapolis, IN USPTO Classifications: 74/127 Tool Categories: screwdrivers : screwdriver mechanisms : spiral screwdrivers Assignees: None Manufacturer: Not known to have been produced Witnesses: Arthur M. Hood Thomas W. McMeans	Patent Dates: Applied: Jan. 24, 1910 Granted: Dec. 20, 1910 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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