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US Patent: 450,972
Pipe Wrench
Patentee:
Thomas Newman (exact or similar names) - Poplar Grove, MO

USPTO Classifications:
81/91.2

Tool Categories:
wrenches : pipe wrenches

Assignees:
William O. Campbell - St. Louis, MO

Manufacturer:
Not known to have been produced

Witnesses:
C. F. Keller
E. Everett Longan
Thos. M. Lane
Samuel Gardner
Patent Dates:
Applied: Jan. 10, 1891
Granted: Apr. 21, 1891

Patent Pictures:
Thomas Newman patent April 21, 1891
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Description:
Bifurcated jaw connected to main handle by parallelogram linkage. Corresponding British patent GB-189102782 was registered Feb. 16, 1891.

See also patent no. 450,676.

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