United States Patent: 3277421 ( 1
Issue Date:
Patent Grant 3277421
U.S. patent number [Application Number ] was granted by the patent office on 1966-10-04 for united states patent: 3277421 ( 1.
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| United States Patent | 3,277,421 |
| Issue Date: | October 4, 1966 |
| Current U.S. Class: | 439/289; 213/1.3; 439/887; 439/733.1; 439/901 |
| Current CPC Class: | B61G 5/10 (20130101); Y10S 439/901 (20130101) |
| Current International Class: | B61G 5/10 (20060101); B61G 5/00 (20060101) |
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