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CA Patent: CA-297
A brace bit for boring and countersinking holes
Patentee:
Tobias Switzer - Norwich, ON Canada

USPTO Classifications:

Tool Categories:
woodworking tools : hand drills : drill bits : countersinks
woodworking tools : hand drills : drill bits : spoon bits

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Mar. 19, 1870

Patent Pictures:
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