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US Patent: 51,465
Improved Wrench
Patentee:
John Parker Lindsay - New Haven, CT

USPTO Classifications:
81/177.1

Tool Categories:
wrenches : nut wrenches
wrenches : wrench components : wrench handle components

Assignees:
None

Manufacturer:
Manvel & Lindsay - New York, NY
A. G. Coes & Co. - Worcester, MA
Union Mfg. Co. - Elizabethport, NJ
Lindsay and Walton - New York, NY
Walton and Co. - New York, NY

Witnesses:
A. Hatch
R. Fitzgerald

Patent Dates:
Granted: Dec. 12, 1865

Patent Pictures: [ 1 | 2 | 3 ]
John Parker Lindsay patent Dec. 12, 1865
USPTO pdf tiff
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Description:
The shank of a monkey wrench is strengthened by a rib on the back side.

The corresponding British patent was granted June 28, 1867 (GB-186701894).

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