Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7826636 | Visual watermark in both data area and inner-ring of record carrier | — | 2010-11-02 |
| 7801327 | Record carrier with watermark | Antonius Jacobus Johannes Werner, Engelbertus Petrus Gerardus Maria Kramer | 2010-09-21 |
| 7263201 | Record carrier with watermark | Antonius Jacobus Johannes Werner, Engelbertus Petrus Gerardus Maria Kramer | 2007-08-28 |