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US Patent: 29,657
Combined Chuck and Countersink
Patentee: Daniel Argerbright (exact or similar names) - Gratis, OH USPTO Classifications: 30/495 Tool Categories: woodworking tools : hand drills : drill bits : hollow bits Assignees: None Manufacturer: Not known to have been produced Witnesses: E. S. Bradstreet A. Stiver	Patent Dates: Granted: Aug. 21, 1860 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)

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