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US Patent: 491,255
Pipe Wrench
Patentee:
William J. Walker (exact or similar names) - St. Louis, MO

USPTO Classifications:
12/142B, 81/103, 81/141

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. B. Clark
J. P. Vastine
C. F. Keller
Emil Starek
Patent Dates:
Applied: Nov. 11, 1892
Granted: Feb. 07, 1893

Patent Pictures:
William J. Walker patent February 7, 1893
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Description:
Improvement to Walker's Sept. 6, 1892 patent (no. 482,109), modifying the adjusting rack and cam lever mechanism.

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