Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6456727 | Method of extracting digital watermark information and method of judging but value of digital watermark information | Isao Echizen, Hiroshi Yoshiura, Yutaka Kurosu | 2002-09-24 |