Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6501903 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Ryuichiro Yoshimura, Takao Sawabe, Kaoru Yamamoto, Akihiro Tozaki, Hisayuki Nakayama +1 more | 2002-12-31 |
| 6396997 | INFORMATION RECORD MEDIUM WHEREIN NAVIGATION INFORMATION IS RECORDED, APPARATUS FOR RECORDING INFORMATION INCLUDING NAVIGATION INFORMATION AND APPARATUS FOR REPRODUCING INFORMATION ACCORDING TO NAVIGATION INFORMATION | Ryuichiro Yoshimura, Takao Sawabe, Junichi Yoshio, Akihiro Tozaki, Kaoru Yamamoto | 2002-05-28 |
| 6389152 | Method and apparatus for superposing a digital watermark and method and apparatus for detecting a digital watermark | Takeshi Nakamura, Kazumi Sugaya | 2002-05-14 |