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US Patent: 904,397
Chain Pipe Wrench
Patentee:
George Amborn - 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:
Eugene V. Myers
Theodore T. Snell
Phillip Bellows
Fred White

Patent Dates:
Applied: May 06, 1907
Granted: Nov. 17, 1908

Patent Pictures:
George Amborn patent Nov. 17, 1908
USPTO pdf tiff
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Description:
The chain pintles and "locks" are formed to allow for finer adjustment - adjustment increments are roughly one-half the length of a chain link.

Arthur C. Fraser & Co. - patent attorneys

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