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United States Patent

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United States Patent 3,424,388
Issue Date: January 28, 1969

Current U.S. Class: 241/79.1 ; 209/1; 241/245; 241/253
Current International Class: B02C 23/00 (20060101); B02C 23/08 (20060101); B02C 7/00 (20060101); B02C 7/08 (20060101)


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

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