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US Patent: 92,261
Improvement in Countersink
Patentee: R. P. Buttles (exact or similar names) - Mansfield, PA USPTO Classifications: 408/193 Tool Categories: woodworking tools : hand drills : drill bits : countersinks Assignees: None Manufacturer: Not known to have been produced Witnesses: F. W. Clark A. J. Webster	Patent Dates: Granted: Jul. 06, 1869 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)

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