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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: USPTO (New site tip) Google Patents 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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