Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5304455 | Master disc | — | 1994-04-19 |
| 5214632 | Method of manufacturing a matrix and a master plate suitable for use in the method | Josephus M. Wijn, George H. Johnson, Howard E. Simmons, III | 1993-05-25 |
| 5114829 | Master disc suitable for the manufacture of matrices containing a recording double layer | Dirk J. Gravesteijn, Josephus M. Wijn | 1992-05-19 |
| 5106721 | Method of recording information, recording element manufactured according to the method and method of producing a metal matrix | Josephus M. Wijn, George H. Johnson, Howard E. Simmons, III | 1992-04-21 |
| 5019487 | Method of manufacturing a metal matrix and a master disc suitable for the manufacture of matrices | Dirk J. Gravesteijn, Josephus M. Wijn | 1991-05-28 |
| 5004660 | Master disc and method of manufacturing a matrix | Maarten A. Van Andel, Josephus M. Wijn | 1991-04-02 |
| 5001035 | Method of recording information, recording element manufactured according to the method and method of producing a metal matrix | Josephus M. Wijn, George H. Johnson, Howard E. Simmons, III | 1991-03-19 |