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US Patent: 609,146
Wrench
Patentee:
Hubert C. Hart - Unionville, CT

USPTO Classifications:
81/176

Tool Categories:
wrenches : bicycle or pocket wrenches
wrenches : wrench components : wrench jaw components

Assignees:
None

Manufacturer:
Upson and Hart - Unionville, CT

Witnesses:
George E. Taft
Ernest M. Hart
J. A. Willson
Fenton S. Belt

Patent Dates:
Applied: Dec. 22, 1897
Granted: Aug. 16, 1898

Patent Pictures: [ 1 | 2 ]
Hubert C. Hart patent August 16, 1898
USPTO pdf tiff
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Description:
Adjustable jaw formed from a symmetrical stamping, including extended "pegs" that form the shaft for the adjusting nut.

Known example marked AETNA PAT. AUG. 16, 98.

According to Ken Cope's "American Wrench Makers 1830-1930," Upson and Hart of Unionville, CT produced this wrench.

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