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US Patent: 101,207
Improvement in Screw and Screw-Driver
Patentee: Allen S. Apgar (exact or similar names) - New York, NY USPTO Classifications: 411/403, 411/919, 81/436 Tool Categories: screwdrivers : screwdriver blades Assignees: Allen S. Apgar - New York, NY Isaac Arnold, Jr. - Haddam, MA Manufacturer: Not known to have been produced Witnesses: S. R. Narine O. D. Roberts	Patent Dates: Granted: Mar. 29, 1870 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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