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US Patent: 1,371,642
Inside pipe-wrench
Patentee:
Allen Olson (exact or similar names) - San Pedro, CA

USPTO Classifications:
81/71

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 20, 1920
Granted: Mar. 15, 1921

Patent Pictures: [ 1 | 2 ]
Patent 1,371,642 - edited drawing
USPTO (New site tip)
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Description:
An "arcuate" exterior jaw, and movable cylindrical inner jaw, designed to grip the pipe.

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