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US Patent: 458,091
Expansion-Bit
Patentee:
Charles Beauchene (exact or similar names) - Lake Linden, MI

USPTO Classifications:
408/190, 408/192, 408/194, 408/195

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Dolphus Rolert
G. O. Girardin

Patent Dates:
Applied: Dec. 23, 1890
Granted: Aug. 18, 1891

Patent Pictures:
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