United States Patent: 3374532

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United States Patent

3,374,532

Issue Date:

March 26, 1968

Current U.S. Class: 29/505; 72/401; 72/369; 182/90

Current CPC Class: B21D 7/06 (20130101); B29C 53/083 (20130101); B21D 11/10 (20130101); B29C 63/18 (20130101); B29L 2023/004 (20130101); B29L 2031/463 (20130101); Y10T 29/49908 (20150115); B29L 2009/00 (20130101); B29L 2023/22 (20130101); B29L 2031/745 (20130101)

Current International Class: B21D 11/00 (20060101); B21D 11/10 (20060101); B21D 7/06 (20060101); B21D 7/00 (20060101); B29C 53/08 (20060101); B29C 63/18 (20060101); B29C 53/00 (20060101); B29C 63/00 (20060101)

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Current U.S. Class:	29/505; 72/401; 72/369; 182/90
Current CPC Class:	B21D 7/06 (20130101); B29C 53/083 (20130101); B21D 11/10 (20130101); B29C 63/18 (20130101); B29L 2023/004 (20130101); B29L 2031/463 (20130101); Y10T 29/49908 (20150115); B29L 2009/00 (20130101); B29L 2023/22 (20130101); B29L 2031/745 (20130101)
Current International Class:	B21D 11/00 (20060101); B21D 11/10 (20060101); B21D 7/06 (20060101); B21D 7/00 (20060101); B29C 53/08 (20060101); B29C 63/18 (20060101); B29C 53/00 (20060101); B29C 63/00 (20060101)