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United States Patent

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United States Patent 2,683,793
Issue Date: July 13, 1954

Current U.S. Class: 219/486 ; 219/201; 219/494; 219/509; 219/510; 219/519; 340/633; 422/95
Current International Class: G01N 25/20 (20060101); G01N 25/32 (20060101)


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

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