Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8059514 | Optical disc comprising a watermark and a method and recorder for recording such a disc | Josephus Arnoldus Henricus Maria Kahlman | 2011-11-15 |
| 7990837 | Optical disc comprising a watermark and a method and recorder for recording such a disc | Josephus Arnoldus Henricus Maria Kahlman | 2011-08-02 |