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US Patent: 641,641
Wrench
Patentee:
Samuel S. Grove (exact or similar names) - Summit, PA

USPTO Classifications:
81/112

Tool Categories:
wrenches : brace wrenches

Assignees:
Samuel S. Grove - Summit, PA
Watson M. Grove - Airy Dale, PA

Manufacturer:
Unknown

Witnesses:
Herman H. Myers
William H. Sechler
M. G. McLean
L. J. McGhie

Patent Dates:
Applied: Aug. 10, 1898
Granted: Jan. 16, 1900

Patent Pictures: [ 1 | 2 ]
Samuel S. Grove patent Jan. 16, 1900
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Description:
Adjustable socket wrench for brace; the jaws slide in openings in the cross head of the central shank. The center of this construction is hollowed.

A known example of the wrench has no visible markings.

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