Patent Explorer
Browse, filter, and analyze 16 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US3170138A | Character recognition system and apparatus | Western Union Telegraph Co | Expired / Lapsed | 1960-04-21 | 1965-02-16 | 1980-04-21 | 0.0 yrs | 2 | |
| US2611026A | Testing arrangement for automatic telegraph switching system | Western Union Telegraph Co | Expired / Lapsed | 1950-02-04 | 1952-09-16 | 1970-02-04 | 0.0 yrs | 0 | |
| US2484838A | Telegraph exchange system | Western Union Telegraph Co | Expired / Lapsed | 1940-08-03 | 1949-10-18 | 1960-08-03 | 0.0 yrs | 0 | |
| US2392355A | Indicating system | Western Union Telegraph Co | Expired / Lapsed | 1942-10-10 | 1946-01-08 | 1962-10-10 | 0.0 yrs | 0 | |
| US2345137A | Telegraph mechanism | Western Union Telegraph Co | Expired / Lapsed | 1942-06-10 | 1944-03-28 | 1962-06-10 | 0.0 yrs | 0 | |
| US2292119A | Adjustable stylus for facsimile recorders | Western Union Telegraph Co | Expired / Lapsed | 1941-02-01 | 1942-08-04 | 1961-02-01 | 0.0 yrs | 0 | |
| US2279295A | Telegraph exchange system | Western Union Telegraph Co | Expired / Lapsed | 1939-10-14 | 1942-04-14 | 1959-10-14 | 0.0 yrs | 0 | |
| US2227121A | Printing telegraph system | Western Union Telegraph Co | Expired / Lapsed | 1938-03-29 | 1940-12-31 | 1958-03-29 | 0.0 yrs | 0 | |
| US2224902A | Electrical terminal and switchboard terminal block | Western Union Telegraph Co | Expired / Lapsed | 1937-06-18 | 1940-12-17 | 1957-06-18 | 0.0 yrs | 0 | |
| US2209326A | Facsimile telegraph system | Western Union Telegraph Co | Expired / Lapsed | 1935-07-09 | 1940-07-30 | 1955-07-09 | 0.0 yrs | 0 | |
| US2186897A | Telautograph system | Western Union Telegraph Co | Expired / Lapsed | 1935-09-28 | 1940-01-09 | 1955-09-28 | 0.0 yrs | 0 | |
| US2154441A | Telegraph system | Western Union Telegraph Co | Expired / Lapsed | 1935-06-18 | 1939-04-18 | 1955-06-18 | 0.0 yrs | 0 | |
| US2150440A | Magnetic and resonator selector for carrier conveyers | Western Union Telegraph Co | Expired / Lapsed | 1936-06-10 | 1939-03-14 | 1956-06-10 | 0.0 yrs | 0 | |
| US2131434A | Sending channel assigner | Western Union Telegraph Co | Expired / Lapsed | 1934-12-11 | 1938-09-27 | 1954-12-11 | 0.0 yrs | 0 | |
| US2027026A | Control means for telegraph printers and projectors | Western Union Telegraph Co | Expired / Lapsed | 1931-11-25 | 1936-01-07 | 1951-11-25 | 0.0 yrs | 0 | |
| US1880906A | Multiplex extended channel system | Western Union Telegraph Co | Expired / Lapsed | 1931-07-09 | 1932-10-04 | 1951-07-09 | 0.0 yrs | 0 |