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US Patent: 370,255
Screw Driver
Patentee:
Daniel R. Hart (exact or similar names) - New York, NY

USPTO Classifications:
411/402, 411/919, 81/436, D8/82

Tool Categories:
screwdrivers : screwdriver blades

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
James S. Greves
Philip J. O'Reilly
Jas. J. Quinn
Geo. Wadman

Patent Dates:
Applied: Jun. 23, 1887
Granted: Sep. 20, 1887

Patent Pictures:
Daniel R. Hart patent September 20, 1887
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Description:
The patent is for a rounded tip on screwdriver blades, shaped to conform to the rounded bottom of the "nick" in wood screws. The drawings show the shape applied to a screwdriver, or to a screwdriver bit for a brace.

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