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US Patent: 68,012
Improvement in the Manufacture of Augers
Manufacture of Single Twist Augers
Patentee:
James Swan - Seymour, CT

USPTO Classifications:
72/332, 72/364, 72/376, 76/102

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:
Charles Douglass
E. H. Knight

Patent Dates:
Granted: Aug. 20, 1867

Patent Pictures:
USPTO pdf tiff
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