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Copperweld Steel Co

Copperweld

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US2421286A	Insulator tie for line conductors	Expired / Lapsed	1945-03-24	1947-05-27	0	Details
US2303449A	Jacketed bullet	Expired / Lapsed	1939-11-21	1942-12-01	0	Details
US2266972A	Method of making composite sheets	Expired / Lapsed	1940-07-23	1941-12-23	0	Details
US2114161A	Electrolytic copper	Expired / Lapsed	1935-12-04	1938-04-12	0	Details
US1883205A	Method of rolling bimetallic articles	Expired / Lapsed	1929-03-19	1932-10-18	0	Details