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US Patent: 921,581
Pipe Wrench
Patentee:
Onesimus  W. Blake - Denver, CO

USPTO Classifications:
81/139

Tool Categories:
wrenches : wrench components : wrench adjustment locks
wrenches : pipe wrenches

Assignees:
James J. Brown - Denver, CO

Manufacturer:
Not known to have been produced

Witnesses:
Louise Cosner
P. J. Edwin Robinson
Otto E. Hoddick
Daisy F. Hughes

Patent Dates:
Applied: Aug. 08, 1908
Granted: May 11, 1909

Patent Pictures:
Onesimus W. Blake patent May 11, 1909
USPTO pdf tiff
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Description:
The major element of the patent is a sliding adjustment lock for the quick-adjusting wrench in patent no. 917,908. This adjustment lock feature has not been seen in known examples of the DENVER WRENCH.

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