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US Patent: 173,356
Improvement in Screw-Drivers
Patentee: Thomas J. Sloan (exact or similar names) - New York, NY USPTO Classifications: 411/405, 411/919, 81/436, 81/461 Tool Categories: screwdrivers : screwdriver blades Assignees: None Manufacturer: Not known to have been produced Witnesses: H. Wells, Jr. Ernst Bilhuber	Patent Dates: Applied: Jan. 22, 1876 Granted: Feb. 08, 1876 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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