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US Patent: 261,925
Screw-driver
Patentee: Eduard Herzig (exact or similar names) - Jersey City, NJ USPTO Classifications: 74/127 Tool Categories: screwdrivers : screwdriver mechanisms : spiral screwdrivers Assignees: None Manufacturer: Not known to have been produced Witnesses: John Catin Jacob Luther	Patent Dates: Applied: May 22, 1882 Granted: Aug. 01, 1882 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin
Description: Information taken from Clifford D. Fales' database. Earliest patent for spiral screwdriver interchangeable bit; Earliest patent for spiral screwdriver free collar.

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