U.S. patent number [Application Number ] was granted by the patent office on 1965-09-21 for united states patent: 3207506 ( 1.
United States Patent | 3,207,506 |
Issue Date: | September 21, 1965 |
Current U.S. Class: | 271/3.19; 271/285; 271/3.2; 271/3.21; 396/646; 271/272; 396/612 |
Current CPC Class: | G03B 27/303 (20130101); B65H 29/58 (20130101); B65H 5/36 (20130101); B65H 2701/1719 (20130101); B65H 2401/222 (20130101); B65H 2404/147 (20130101); B65H 2301/31124 (20130101); B65H 2407/21 (20130101); B65H 2404/262 (20130101) |
Current International Class: | G03B 27/02 (20060101); G03B 27/30 (20060101) |
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