Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6449015 | Redundant picture detecting device, and picture converting apparatus employing the same | — | 2002-09-10 |
| 6389152 | Method and apparatus for superposing a digital watermark and method and apparatus for detecting a digital watermark | Takeshi Nakamura, Yoshiaki Moriyama | 2002-05-14 |