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US Patent: 173,356
Improvement in Screw-Drivers
Patentee:
Thomas J. Sloan - New York, NY

USPTO Classifications:
411/405, 411/919, 81/436, 81/461

Tool Categories:
screwdrivers : screwdriver blades

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. Wells, Jr.
Ernst Bilhuber

Patent Dates:
Applied: Jan. 22, 1876
Granted: Feb. 08, 1876

Patent Pictures:
USPTO pdf tiff
Google Patents
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