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United States Patent

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United States Patent 1,574,521
Issue Date: February 23, 1926

Current U.S. Class: 338/166 ; 200/11J; 338/170; 338/175
Current International Class: H01C 10/32 (20060101); H01C 10/00 (20060101)


For U.S. patent law, rules, and procedures see MPEP.

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