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US Patent: 117,237
Improvement in Countersinks
Patentee:
Sewall L. Abbott (exact or similar names) - Deering, ME

USPTO Classifications:
408/229

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

Assignees:
None

Manufacturer:
Unknown

Witnesses:
William Henry Clifford
George E. Bird

Patent Dates:
Granted: Jul. 25, 1871

Reissue Information:
Reissued as RE4,754 (Feb. 13, 1872)

Patent Pictures:
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