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US Patent: 1,380,566
Pipe Wrench
Patentee:
Arthur Wellington Kiefer - Chicago, Cook County, IL

USPTO Classifications:
81/103

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Oct. 21, 1920
Granted: Jun. 07, 1921

Patent Pictures:
Arthur W. Kiefer patent June 7, 1921
USPTO pdf tiff
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Description:
Quick adjust pipe wrench; improves Kiefer's Sept. 21, 1920 patent no. 1,353,246.

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