United States Patent: 3437377 ( 1

Issue Date:

Patent Grant 3437377

U.S. patent number [Application Number ] was granted by the patent office on 1969-04-08 for united states patent: 3437377 ( 1.


Full text is not available for this patent. Click on "Images" button above to view full patent.

United States Patent 3,437,377
Issue Date: April 8, 1969
Current U.S. Class: 299/1.4; 175/26
Current CPC Class: E21C 31/00 (20130101)
Current International Class: E21C 31/00 (20060101)


* * * * *


© 2021 USPTO.report | Privacy Policy | Resources | RSS Feed of Trademarks | Trademark Filings Twitter Feed