United States Patent: 3494380

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United States Patent

3,494,380

Issue Date:

February 10, 1970

Current U.S. Class: 138/39; 415/146; 137/15.1; 244/53B; 415/156

Current CPC Class: F02C 7/042 (20130101); B64C 29/0091 (20130101); Y10T 137/0536 (20150401)

Current International Class: F02C 7/042 (20060101); F02C 7/04 (20060101); B64C 29/00 (20060101)

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Current U.S. Class:	138/39; 415/146; 137/15.1; 244/53B; 415/156
Current CPC Class:	F02C 7/042 (20130101); B64C 29/0091 (20130101); Y10T 137/0536 (20150401)
Current International Class:	F02C 7/042 (20060101); F02C 7/04 (20060101); B64C 29/00 (20060101)