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US Patent: 52,174
Improvement in Bits for Boring Holes
Patentees:
Charles F. Kimball - Portland, ME
Alexander Parsons - Portland, ME

USPTO Classifications:
408/192

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
William H. Clifford
J. F. Richardson

Patent Dates:
Granted: Jan. 23, 1866

Patent Pictures: [ 1 | 2 ]
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