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US Patent: 111,167
Improvement in hollow augers
Patentees:
Aaron Bauman (exact or similar names) - Toledo, OH
Orin O. Witherell (exact or similar names) - Toledo, OH

USPTO Classifications:
175/404, 408/59, 408/67

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Robert McAran
E. Lewis
Patent Dates:
Granted: Jan. 24, 1871

Patent Pictures:
USPTO (New site tip)
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