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US Patent: 2,190,081
Coupling
Patentee:
Edward M. Pfauser - Elm Grove, WI

USPTO Classifications:
403/328, 403/361, 81/177.85

Tool Categories:
wrenches : wrench components

Assignees:
Blackhawk Mfg. Co. - Milwaukee, WI

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Jan. 22, 1936
Granted: Feb. 13, 1940

Patent Pictures:
USPTO pdf tiff
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Morsell, Lieber & Morsell - patent attorneys

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