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US Patent: 74,490
Improvement in Screw-Drivers and Boring-Tool
Screwdriver and Countersink
Patentee:
Jason A. Bidwell - East Boston, MA

USPTO Classifications:
408/191, 411/910, 411/919, 7/158, 7/165, 81/436

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
William B. W. Hallett
Stephen A. Cooke, Jr.

Patent Dates:
Granted: Feb. 18, 1868

Patent Pictures:
USPTO pdf tiff
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