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US Patent: 261,925
Screw-driver
Patentee:
Eduard Herzig - Jersey City, NJ

USPTO Classifications:
74/127

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: May 22, 1882
Granted: Aug. 01, 1882

Patent Pictures:
USPTO pdf tiff
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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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