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US Patent: 93,807
Improvement in Countersink and Bit
Patentee:
William A. Clark - Woodbridge, CT

USPTO Classifications:
408/191

Tool Categories:
woodworking tools : hand drills : drill bits : countersinks

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. J. Tibbits
J. H. Shumway

Patent Dates:
Granted: Aug. 17, 1869

Patent Pictures: [ 1 | 2 ]
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