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US Patent: 391,880
Screw-driver
Patentee:
Michael Cashin - New York, NY

USPTO Classifications:
192/43.1, 74/127

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Edward Whelan
Joseph Cashin

Patent Dates:
Applied: Mar. 31, 1888
Granted: Oct. 30, 1888

Patent Pictures:
USPTO pdf tiff
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