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CA Patent: CA-55,989
Chain Wrench
George Amborn - Brooklyn, NY
William Joseph Grinden - Brooklyn, NY

USPTO Classifications:

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

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

Not known to have been produced

Geo. T. Pinckney
S. J. Haviland
J. Staib
Chas. H. Smith

Patent Dates:
Applied: Mar. 04, 1897
Granted: May 19, 1897

Patent Pictures:
J.H. Williams & Co. (assignee of W.J. Grinden and G. Amborn) patent May 19, 1897 edited from CANADIAN PATENT OFFICE RECORD
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Canadian patent no. 55,989 in FLICKR
55,989 in Canadian Patents Database
The focus in this patent is the shape of the "forked" double jaw structure and the pin that holds the fixed end of the chain. The overall wrench structure is similar to that in patent no. 577,653 and Canadian patent CA-55,988.

Corresponding U.S. patent no. 577,654 was issued February 23, 1897.

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