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US Patent: 1,259,926
Mechanical movement
Patentee: Ira E. Stump (exact or similar names) - Cleveland, OH USPTO Classifications: 74/127 Tool Categories: screwdrivers : screwdriver mechanisms : spiral screwdrivers Assignees: Obed C. Billman - Cleveland, OH Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Nov. 20, 1916 Granted: Mar. 19, 1918 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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