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US Patent: 489,048
Pipe Wrench
Patentees:
Freeman L. Twiss - Groton, Tompkins County, NY
Luther A. Barber - Groton, Tompkins County, NY

USPTO Classifications:
74/164, 81/185.1, 81/65, 81/68

Tool Categories:
wrenches : pipe wrenches : chain and strap wrenches

Assignees:
None

Manufacturer:
Unknown

Witnesses:
T. F. Fitzpatrick
E. A. Marsh
H. A. Carhart
C. B. Kinie

Patent Dates:
Applied: Nov. 05, 1892
Granted: Jan. 03, 1893

Patent Pictures: [ 1 | 2 ]
Freeman L. Twiss and Luther A Barber patent January 3, 1893
USPTO pdf tiff
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Description:
The handle is threaded into the chain head, and adjusts the toothed face to grip pipe.

A known incomplete example is missing the toothed gripping head, and is marked with the patent date.

Smith & Denison - patent attorneys

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