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US Patent: 151,635
Wrenches
Patentees:
William P. Uhlinger - Philadelphia, PA
Philip J. Hoffliger - Philadelphia, PA

USPTO Classifications:
81/124.3, 81/124.4

Tool Categories:
wrenches : socket wrenches
wrenches : wrench components : wrench jaw components

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
George E. Upham
Robert Everett
Wm. Neill
H. Dienell

Patent Dates:
Applied: Mar. 02, 1874
Granted: Jun. 02, 1874

Patent Pictures:
W. P. Uhlinger and P. J. Hoffliger Pat. June 2, 1874
USPTO pdf tiff
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Description:
The wrench has "sockets" on opposite sides for square and hex nuts. The cut-out "corners" cause the wrench to bear on the flats of the nuts rather than the corners.

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