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US Patent: 86,674
Improvement in Countersink
Patentee:
Louis H. Hunt - Rockingham, VT

USPTO Classifications:
408/209

Tool Categories:
woodworking tools : hand drills : drill bits : countersinks

Assignees:
Nathaniel G. Manson, Jr. - Cambridgeport, MA
Louis H. Hunt - Rockingham, VT

Manufacturer:
Not known to have been produced

Witnesses:
S. F. Hubbard
Charles L. Hubbard

Patent Dates:
Granted: Feb. 09, 1869

Patent Pictures:
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Description:
Claim relates to solid struts, for strength, combined with formed sheet steel cutters to allow chip clearance.

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