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United States Patent

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United States Patent 2,664,457
Issue Date: December 29, 1953

Current U.S. Class: 174/153R ; 174/140R; 174/145; 313/243; 313/325; 439/727; 439/779
Current International Class: H01F 27/02 (20060101); H01B 17/26 (20060101); H01F 27/04 (20060101)


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

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