Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4911534 | Optical unit for inscribing and/or scanning an information track without mechanical contact, and apparatus provided with the optical unit | Henricus M. C. Van Gestel, Petrus J. Blankers | 1990-03-27 |
| 4634020 | Cassette with a latching pivoted cover | Hubertus F. W. van de Kerkhof, Karel G. M. Koken, John C. J. Olierook | 1987-01-06 |
| 4621297 | Cassette with cover latches controlling the cover opening direction | Karel G. M. Koken, John C. J. Olierook | 1986-11-04 |
| 4576345 | Magnetic-tape cassette with a latching cover plate | Karel G. M. Koken, Hubertus F. W. van de Kerkhof, John C. J. Olierook | 1986-03-18 |