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US Patent: 769,042
Chain Pipe Wrench
Improvements in Chain Pipe-Wrenches Having an Enclosed Chain-Receiving Passage
Patentees:
George Amborn - New York, NY
George W. Bufford - New York, NY

USPTO Classifications:
81/70

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

Assignees:
J. H. Williams & Co. - Brooklyn, NY

Manufacturer:
Not known to have been produced

Witnesses:
Mortimer J. Travis
William H. Anderson, Jr.
H. S. Austin
W. J. Tinkler

Patent Dates:
Applied: Apr. 19, 1904
Granted: Aug. 30, 1904

Patent Pictures:
George Amborn and George W. Bufford patent August 30, 1904
USPTO pdf tiff
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Description:
Chain wrench - in the ancestry of the single jaw "AGRIPPA" chain wrench.

Arthur S. Browne - patent attorney

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