US Patent: 413,940 - Pipe Wrench


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US Patent: 413,940

Pipe Wrench

Patentee:

John Thomas Hawkins (exact or similar names) - 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

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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), German patent DE-50326 (effective June 4, 1889) and Canadian patent CA-34,269 (granted May 7, 1890) combine features of both patents into one set of claims.