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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)
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