Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6765861 | Record carrier and apparatus for scanning the record carrier | Johannes Hendrikus Maria Spruit, Ronald R. Drenten, Jakob Gerrit Nijboer, Paulus G. P. Weyenbergh | 2004-07-20 |
| 6714508 | Optical recording carrier having groove wobble phase changes between subsequent predetermined positions | Johannes Hendrikus Maria Spruit | 2004-03-30 |