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US Patent: 1,531,086
Spiral tool
Patentees: Thomas J. Fegley (exact or similar names) - Philadelphia, PA George O. Leopold (exact or similar names) - Philadelphia, PA USPTO Classifications: 74/127 Tool Categories: screwdrivers : screwdriver mechanisms : spiral screwdrivers Assignees: North Brothers Manufacturing Co. - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 16, 1923 Granted: Mar. 24, 1925 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward George Langford

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