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US Patent: 187,600
Improvement in Tool-Holders
Combination Countersink, Screwdriver & Gimlet Bit
Patentee:
George Collins - Fort Wayne, MI

USPTO Classifications:
279/14, 408/117, 408/20, 408/239R, 408/35, 7/165, 7/168, 81/440

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. F. Eberts
Charles J. Hunt

Patent Dates:
Applied: Aug. 31, 1876
Granted: Feb. 20, 1877

Patent Pictures:
USPTO pdf tiff
Google Patents
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