Western Union Telegraph Co
Western UnActive Patents
0
Total Holdings
9
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2611026A | Testing arrangement for automatic telegraph switching system | Expired / Lapsed | 1950-02-04 | 1952-09-16 | 0 | Details |
| US2484838A | Telegraph exchange system | Expired / Lapsed | 1940-08-03 | 1949-10-18 | 0 | Details |
| US2392355A | Indicating system | Expired / Lapsed | 1942-10-10 | 1946-01-08 | 0 | Details |
| US2292119A | Adjustable stylus for facsimile recorders | Expired / Lapsed | 1941-02-01 | 1942-08-04 | 0 | Details |
| US2279295A | Telegraph exchange system | Expired / Lapsed | 1939-10-14 | 1942-04-14 | 0 | Details |
| US2227121A | Printing telegraph system | Expired / Lapsed | 1938-03-29 | 1940-12-31 | 0 | Details |
| US2209326A | Facsimile telegraph system | Expired / Lapsed | 1935-07-09 | 1940-07-30 | 0 | Details |
| US2131434A | Sending channel assigner | Expired / Lapsed | 1934-12-11 | 1938-09-27 | 0 | Details |
| US1880906A | Multiplex extended channel system | Expired / Lapsed | 1931-07-09 | 1932-10-04 | 0 | Details |