Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866262 | Optical imaging arrangement comprising an opto-electronic focussing-error detection system | Jan Evert Van Der Werf | 1989-09-12 |
| 4310899 | Thermomagnetic record carrier | Albertus G. Dirks | 1982-01-12 |