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US Patent: 146,212
Improvement in Dies for Forming Auger-Bits
Patentee:
James Swan - Seymour, CT

USPTO Classifications:
72/467, 72/64

Tool Categories:
tool making : making drills and augers
woodworking tools : hand drills : drill bits : auger bits

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
G. W. Divine
A. J. Tibbits

Patent Dates:
Applied: Dec. 10, 1873
Granted: Jan. 06, 1874

Patent Pictures:
USPTO pdf tiff
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