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GB Patent: GB-189,107,938
Pipe Wrench
Truman De W. Keith - South Pasadena, CA

USPTO Classifications:

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : self-adjust wrenches


Not known to have been produced

none listed

Patent Dates:
Granted: May 08, 1891

Patent Pictures:
Truman De W. Keith patent registered May 8, 1891 - edited from "Abridgments of Specifications"
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Combination quick and self-adjust pipe wrench corresponding to U.S. patent 447,952 and Canadian patent CA-36,549.

Note: Early British patents (pre 1916) were numbered by the year and started at patent #1 at the start of each year in January. The patent # used in DATAMP represents the year of registration and the patent # (with "leading zeros" interposed to make the number total nine digits). This patent is #7,938 of the year 1891.

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