Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4749904 | Cathode ray tube with an ion trap including a barrier member | — | 1988-06-07 |
| 4736135 | Electron emission device provided with a reservoir containing material reducing the electron work function | Jan Zwier, Johannes van Esdonk | 1988-04-05 |
| 4717855 | Dual-cathode electron emission device | Jan Zwier | 1988-01-05 |