Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6772133 | Information recording device and information reproducting device | Koichiro Akiyama, Yutaka Handa, Yoshihiro Ohmori | 2004-08-03 |
| 6741723 | Digital watermark embedding method and apparatus, and digital watermark | Tomoo Yamakage, Hirofumi Muratani, Hisashi Yamada, Shinichiro Koto | 2004-05-25 |