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US Patent: 430,901
Screw-driver
Patentee: Harod H. True (exact or similar names) - Sioux City, IA USPTO Classifications: 7/146, 7/165, 74/127 Tool Categories: screwdrivers : screwdriver mechanisms : spiral screwdrivers Assignees: David S. Shellabarger - Sioux City, IA Manufacturer: Not known to have been produced Witnesses: R. E. Canniff E. H. Lewis	Patent Dates: Applied: Feb. 03, 1890 Granted: Jun. 24, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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