United States Patent: 3177670 ( 1
Issue Date:
U.S. patent number [Application Number ] was granted by the patent office on 1965-04-13 for united states patent: 3177670 ( 1.
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| United States Patent | 3,177,670 |
| Issue Date: | April 13, 1965 |
| Current U.S. Class: | 62/3.6; 62/441; 62/3.7 |
| Current CPC Class: | F25B 21/02 (20130101); G05D 23/1927 (20130101); G05D 23/275 (20130101); G05D 23/1919 (20130101); H01L 35/00 (20130101); F25D 11/00 (20130101); F25B 2321/021 (20130101) |
| Current International Class: | H01L 35/00 (20060101); F25B 21/02 (20060101); G05D 23/275 (20060101); F25D 11/00 (20060101) |
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