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US Patent: 413,940
Pipe Wrench
Patentee:
John T. Hawkins - Taunton, MA

USPTO Classifications:
81/175, 81/179, 81/186

Tool Categories:
wrenches : alligator wrenches
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Francis P. Reilly
Alfred S. Brown
F. H. Davies

Patent Dates:
Applied: Apr. 29, 1889
Granted: Oct. 29, 1889

Patent Pictures:
John T. Hawkins patent October 29, 1889
USPTO pdf tiff
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Description:
An improved full width adjustable stop for the smooth jaw of an "alligator wrench" -- although not noted in the specifications, the wrench in question is patent no. 404,619.

British patent GB-188909296 (registered June 4, 1889) and Canadian patent CA-34,269 (granted May 7, 1890) combine features of both patents into one set of claims.

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