Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4961022 | Display tube including a helical focusing lens with a non-rotationally symmetrical lens element | Gerardus J. A. Hellings, Erich E. Himmelbauer, Gerardus A. H. M. Vrijssen, Tjerk G. Spanjer, Willem M. Van Alphen +1 more | 1990-10-02 |
| 4945283 | Cathode ray tube having a tubular focus structure | Gerardus J. A. Hellings, Erich E. Himmelbauer, Tjerk G. Spanjer, Gerardus A. H. M. Vrijssen | 1990-07-31 |
| 4685891 | Method of assembling an integrated electron gun system | Petrus A. M. Fleuren | 1987-08-11 |
| 4499402 | Color display tube | — | 1985-02-12 |
| 4337409 | Color display tube with control grid positioning feature | Jorg Brambring, Johannes M. J. Spruyt | 1982-06-29 |