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US Patent: 86,364
Improvement in Hollow Augers
Patentee:
William A. Clark - Woodbridge, CT

USPTO Classifications:
30/495

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Michael Ryam
A. J. Tibbits

Patent Dates:
Granted: Feb. 02, 1869

Patent Pictures:
USPTO pdf tiff
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