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US Patent: 70,923
Improvement in Screw-Drivers
Patentee:
T. D. Vorhees - Easton, PA

USPTO Classifications:
16/431, 43/23, 81/177.1, 81/436

Tool Categories:
screwdrivers : screwdriver mechanisms

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
William F. McNamara
Alex. F. Roberts

Patent Dates:
Granted: Nov. 12, 1867

Patent Pictures:
USPTO pdf tiff
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