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US Patent: 32,106
Improvement in Wrenches
George W. Martin - Morrisania, NY

USPTO Classifications:
81/152, 81/177.1

Tool Categories:
wrenches : wrench components : wrench jaw components
wrenches : wrench adjustment types : self-adjust wrenches

William Sheppard - Tremont, NY
George W. Martin - Morrisania, NY

Not known to have been produced

Thos. George Harold
Lemuel W. Serrell

Patent Dates:
Applied: Feb. 14, 1861
Granted: Apr. 16, 1861

Patent Pictures:
George W. Martin Feb. 14, 1861
USPTO pdf tiff
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The movable jaw slides on the shank, and the adjustment is held by the rocking cam action of the jaw.

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