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US Patent: 326,978
Pipe Wrench
Improvement in Pipe-Tongs
Patentee:
William Harris (exact or similar names) - Pittsburgh, PA

USPTO Classifications:
81/178, 81/423

Tool Categories:
wrenches : pipe wrenches : pipe tongs
wrenches : wrench components : wrench jaw components

Assignees:
None

Manufacturer:
Wm. Harris and Son - Pittsburgh, PA

Witnesses:
Walter Reese
W. M. Gormly
H. Ahlers
Patent Dates:
Applied: Jul. 13, 1885
Granted: Sep. 29, 1885

Patent Pictures:
William Harris patent September 29, 1885
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Description:
The gripping bit is a hardened piece held to the end of of the jaw by a collar and tapered drive pin.

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