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US Patent: 256,979
Extension-Bit and Washer-Cutter
Washer Cutter and Adjustable Bit
Patentee:
John W. Cooper - Philadelphia, PA

USPTO Classifications:
408/147, 408/190, 408/192, 408/195

Tool Categories:
woodworking tools : hand drills : drill bits : washer cutters

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Cyrus Roose
Sarah E. Cooper

Patent Dates:
Applied: Sep. 01, 1881
Granted: Apr. 25, 1882

Patent Pictures: [ 1 | 2 ]
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