Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5878019 | Record carrier having at least two information volumes | Erik C. Schylander, Gerrit D. Westerhout, Adrianus H. Dieleman | 1999-03-02 |
| 5684786 | Record carrier having an information volume including audio information and an information volume including additional non-audio information | Erik C. Schylander, Gerrit D. Westerhout, Adrianus H. Dieleman | 1997-11-04 |
| 5341356 | Method and device for recording information volumes in a track of a record carrier, and a device for reading the record carrier | Adrianus H. Dieleman, Gerrit D. Westerhout | 1994-08-23 |
| 5301172 | Method of storing user information items and apparatus for reproducing stored items | Norman D. Richards, Jozef M. K. Timmermans, Harmen D. Voogd | 1994-04-05 |