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US Patent: 52,174
Improvement in Bits for Boring Holes
Patentees: Charles F. Kimball (exact or similar names) - Portland, ME Alexander Parsons (exact or similar names) - 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 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)

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