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US Patent: 177,820
Tap Wrench
Patentee:
James F. Dunigan (exact or similar names) - Deerfield, MA

USPTO Classifications:
408/240

Tool Categories:
wrenches : tap wrenches and die stocks

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
George Turner
Philipp Seibert
Patent Dates:
Applied: Feb. 08, 1876
Granted: May 23, 1876

Patent Pictures:
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