Patent Explorer
Browse, filter, and analyze 4 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2211613A | Cathode ray tube | Hygrade Sylvania Corp | Expired / Lapsed | 1936-08-14 | 1940-08-13 | 1956-08-14 | 0.0 yrs | 0 | |
| US2211614A | Cathode ray tube and the like | Hygrade Sylvania Corp | Expired / Lapsed | 1937-06-24 | 1940-08-13 | 1957-06-24 | 0.0 yrs | 0 | |
| US2209929A | Electrographic system and apparatus | Hygrade Sylvania Corp | Expired / Lapsed | 1937-11-20 | 1940-07-30 | 1957-11-20 | 0.0 yrs | 0 | |
| US2174853A | Electron gun structure and method of assembly thereof | Hygrade Sylvania Corp | Expired / Lapsed | 1937-08-26 | 1939-10-03 | 1957-08-26 | 0.0 yrs | 0 |