Patent Explorer
Browse, filter, and analyze 13 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2498357A | Process of making insulated electrical conductors | Hitachi Rail STS USA Inc | Expired / Lapsed | 1946-01-24 | 1950-02-21 | 1966-01-24 | 0.0 yrs | 0 | |
| US2409696A | Remote control system | Hitachi Rail STS USA Inc | Expired / Lapsed | 1943-03-06 | 1946-10-22 | 1963-03-06 | 0.0 yrs | 0 | |
| US2400260A | Selective control and indication system | Hitachi Rail STS USA Inc | Expired / Lapsed | 1943-07-17 | 1946-05-14 | 1963-07-17 | 0.0 yrs | 0 | |
| US2277469A | Receiving apparatus for train communication systems | Hitachi Rail STS USA Inc | Expired / Lapsed | 1940-12-31 | 1942-03-24 | 1960-12-31 | 0.0 yrs | 0 | |
| US2229249A | Remote control system | Hitachi Rail STS USA Inc | Expired / Lapsed | 1932-03-23 | 1941-01-21 | 1952-03-23 | 0.0 yrs | 0 | |
| US2224374A | Remote control system | Hitachi Rail STS USA Inc | Expired / Lapsed | 1940-03-16 | 1940-12-10 | 1960-03-16 | 0.0 yrs | 0 | |
| US2222048A | Apparatus for the production of electric oscillations | Hitachi Rail STS USA Inc | Expired / Lapsed | 1940-02-21 | 1940-11-19 | 1960-02-21 | 0.0 yrs | 0 | |
| US2172887A | Electrical rectifier | Hitachi Rail STS USA Inc | Expired / Lapsed | 1937-10-21 | 1939-09-12 | 1957-10-21 | 0.0 yrs | 0 | |
| US1905724A | Electric current valve | Hitachi Rail STS USA Inc | Expired / Lapsed | 1927-08-08 | 1933-04-25 | 1947-08-08 | 0.0 yrs | 0 | |
| US1862211A | Electrical translating apparatus | Hitachi Rail STS USA Inc | Expired / Lapsed | 1928-06-20 | 1932-06-07 | 1948-06-20 | 0.0 yrs | 0 | |
| US1797587A | Current rectifying apparatus | Hitachi Rail STS USA Inc | Expired / Lapsed | 1927-03-29 | 1931-03-24 | 1947-03-29 | 0.0 yrs | 0 | |
| US1750123A | Apparatus for rectifying alternating electric currents | Hitachi Rail STS USA Inc | Expired / Lapsed | 1928-11-15 | 1930-03-11 | 1948-11-15 | 0.0 yrs | 0 | |
| US1640335A | Unidirectional current-carrying device | Hitachi Rail STS USA Inc | Expired / Lapsed | 1925-01-07 | 1927-08-23 | 1945-01-07 | 0.0 yrs | 0 |