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US Patent: 1,278,653
Pipe & Nut Wrench
Patentee:
Henry F. Hoffman - New York, NY

USPTO Classifications:
81/103

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

Assignees:
None

Manufacturer:
Unknown

Witnesses:
L Hauerstein
George L. Beeler

Patent Dates:
Applied: Nov. 11, 1916
Granted: Sep. 10, 1918

Patent Pictures:
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Description:
According to Ken Cope's "American Wrench Makers 1830-1930," this is the second of two Hoffman patents used for a pipe and nut wrench manufactured by Hoffman. The earlier patent is dated Aug. 12, 1913 (pat. no. 1,070,343). Cope's book cites a 1913 "Scientific American" listing as documentation.

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