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US Patent: 50,328
Improvement in Screw-Drivers
Patentee:
William G. A. Bonwill - Dover, DE

USPTO Classifications:
408/187, 7/158, 7/165, 7/168

Tool Categories:
screwdrivers : screwdriver blades
woodworking tools : hand drills : drill bits : countersinks

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
M. M. Livingston
C. L. Lopliff

Patent Dates:
Granted: Oct. 10, 1865

Patent Pictures:
USPTO pdf tiff
Google Patents
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