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US Patent: 183,798
Improvement in Tools for Sharpening Drills
Patentee:
Amos F. Champlin - Hartford, CT

USPTO Classifications:
451/367, 451/375

Tool Categories:
metalworking machines : grinders : sharpening machines : bench or pedestal grinders
woodworking tools : hand drills : drill bits : twist drill bits

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Theo. G. Ellis
John T. Peters

Patent Dates:
Applied: Aug. 12, 1876
Granted: Oct. 31, 1876

Patent Pictures:
USPTO pdf tiff
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