Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4950192 | Method of manufacturing of color display tube | Piet C. J. Rens | 1990-08-21 |
| 4644577 | X-ray tube comprising an anode disc rotatably journalled on a helical-groove bearing | Jan Gerkema, Johannes L. M. Hagen | 1987-02-17 |