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US Patent: 100,440
Improvement in auger for boring square holes
Patentee:
Alfred T. Perrine (exact or similar names) - Louisville, KY

USPTO Classifications:
408/30

Tool Categories:
metalworking machines : drilling and boring : drill bits
woodworking tools : chisels : mortise chisels
woodworking tools : hand drills : drill bits

Assignees:
Alfred T. Perrine - Louisville, KY
William C. Chase - Providence, RI

Manufacturer:
Not known to have been produced

Witnesses:
J. Erastus Lester
George H. McCann

Patent Dates:
Granted: Mar. 01, 1870

Patent Pictures:
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