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US Patent: 120,641
Improvement in Pipe Wrenches
Patentee:
Ira S. Hamilton (exact or similar names) - Hamilton, OH

USPTO Classifications:
81/150, 81/186, 81/94

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Frank Millward
Elitha F. Layman
Henry Millward
Wm. R. McComas
Patent Dates:
Granted: Nov. 07, 1871

Patent Pictures:
Ira S. Hamilton Pat. Nov. 7, 1871
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Description:
The shape of the adjustable jaw is designed to grip pipe, with the "claw" on the outer end serving as a limit to prevent collapsing the pipe.

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