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US Patent: 108,837
Improvement in Countersinks
Patentee:
William B. Shedd (exact or similar names) - East Boston, MA

USPTO Classifications:
408/191

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Fred. Curtis
Ed. Griffith
Patent Dates:
Granted: Nov. 01, 1870

Patent Pictures:
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