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US Patent: 201,372
Improvement in screw-drivers
Patentee:
Jonathan B. West - Geneseo, NY

USPTO Classifications:
74/127, 74/424.75, 74/424.94, 74/89.45

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: May 04, 1877
Granted: Mar. 19, 1878

Patent Pictures:
USPTO pdf tiff
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