Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6671388 | Method and apparatus for detecting a watermark in a manipulated image | Marc Joseph Rita Op De Beeck, Antonius Kalker | 2003-12-30 |
| 6577745 | Watermark detection | Marc Joseph Rita Op De Beeck, Geert F. G. Depovere, Antonius A. C. M. Kalker | 2003-06-10 |
| 6577747 | Detection of auxiliary data in an information signal | Antonius Kalker | 2003-06-10 |
| 6505223 | Watermark detection | Antonius A. C. M. Kalker, Adrianus Johannes Maria Denissen | 2003-01-07 |