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US Patent: 99,970
Improvement in Machine for Grinding and Polishing Bits
Machine for Grinding & Polishing Bits
Patentee:
James Swan (exact or similar names) - Seymour, CT

USPTO Classifications:
451/143, 451/222

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:
John H. Swain
B. W. Smith

Patent Dates:
Granted: Feb. 15, 1870

Patent Pictures: [ 1 | 2 ]
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