Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4675227 | Information recording element | Petrus J. Kivits | 1987-06-23 |
| 4318112 | Optical recording disc | Petrus J. Kivits, Adriaan W. De Poorter | 1982-03-02 |
| 4298975 | Optical recording medium and method of optically recording information thereon | Jan van der Veen, Petrus J. Kivits | 1981-11-03 |
| 4230939 | Information-recording element having a dye-containing auxiliary layer | Petrus J. Kivits, Cornelis J. Schoot, Pieter Zalm | 1980-10-28 |