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US Patent: 39,206
Improved Screwdriver
Patentee:
J. A. Ayres - Hartford, CT

USPTO Classifications:
81/448

Tool Categories:
screwdrivers : screwdriver blades

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chas. C. Shultas
David L. Hubbard

Patent Dates:
Granted: Jul. 14, 1863

Patent Pictures:
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Description:
Screwdriver blade is two ended: One end a conventional slotted screwdriver blade; the second end slotted to allow it to fully fill and grip the screw slot. It is designed to be used with a conventional screw or with his dovetail slotted screw, patented April, 14, 1863 38,141.

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