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US Patent: 1,434,401
Basin Cock Wrench
Philip Mueller - Decatur, IL

USPTO Classifications:
81/124.2, 81/DIG.8

Tool Categories:
wrenches : basin wrenches

Adolph Mueller - Decatur, IL

H. Mueller Mfg. Co. - Decatur, IL

none listed

Patent Dates:
Applied: Nov. 23, 1921
Granted: Nov. 07, 1922

Patent Pictures:
Philip Mueller patent November 7, 1922
USPTO pdf tiff
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"T" handle with the wrench head set at 90 degrees. The opening fits four "flats" and five corners of a hexagonal nut which prevents the wrench from slipping off sideways in the confined space where such wrenches were used.

A known example is marked "MUELLER" on the back side.

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