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US Patent: 381,092
Machine for Grooving Bit-Blanks
Patentee:
James Swan - Seymour, CT

USPTO Classifications:
409/73

Tool Categories:
tool making : making drills and augers
woodworking tools : hand drills : drill bits : twist drill bits

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. M. Wooster
B. E. Lee

Patent Dates:
Applied: Jan. 26, 1888
Granted: Apr. 10, 1888

Patent Pictures:
USPTO pdf tiff
Google Patents
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