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US Patent: 892,327
Nut and Pipe Wrench
David Stewart - Schenectady, NY

USPTO Classifications:

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches

Stewart Wrench and Manufacturing Company - Schenectady, NY

Stewart Wrench and Manufacturing Company - Schenectady, NY

Helen Wechsler
Max B. A. Doring
A. Laura Stock
Edward E. Kaufmann

Patent Dates:
Applied: Oct. 03, 1904
Granted: Jun. 30, 1908

Patent Pictures:
David Stewart patent June 30, 1908
USPTO pdf tiff
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The patent claims a number of specific details of construction of the fixed jaw and adjustable jaw structure. In the design shown here, the movable jaw is slid on from the end, and the fixed jaw structure is subsequently attached. Parallel patent 892,326 sets forth additional options for those parts.

1908 trade journals announce production of the wrench.

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