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US Patent: 679,693
Combined Drill and Countersink
Patentee: William Burkhart (exact or similar names) - Williamsport, PA USPTO Classifications: 408/191, 408/202 Tool Categories: woodworking tools : hand drills : drill bits : countersinks Assignees: George B. Updegraff - Williamsport, PA William Burkhart - Williamsport, PA Manufacturer: Not known to have been produced Witnesses: S. K. McBride E. W. Batzle	Patent Dates: Applied: Apr. 13, 1901 Granted: Jul. 30, 1901 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)
Description: Sleeve is reversible and can be used as a countersink or depth stop.

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