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US Patent: 90,755
Improvement in Auger-Bits
Patentee:
William A. Ives (exact or similar names) - New Haven, CT

USPTO Classifications:
408/213

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John E. Earle
John H. Shumway

Patent Dates:
Granted: Jun. 01, 1869

Patent Pictures:
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Report data errors or omissions to steward Jeff Joslin (dm)
Description:
Purpose of this patent was to combine the primary characteristics of a centre-bit with a double-twist auger.

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