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US Patent: 67,014
Improved Screw-Driver
Patentee:
Jared A. Ayres - Hartford, CT

USPTO Classifications:
81/436

Tool Categories:
screwdrivers : screwdriver blades

Assignees:
National Screw Company - Hartford, CT

Manufacturer:
Not known to have been produced

Witnesses:
F. Chamberlin
M. W. Chamberlin

Patent Dates:
Granted: Jul. 23, 1867

Patent Pictures:
USPTO pdf tiff
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