Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6778761 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Yoshiaki Moriyama, Hidehiro Ishii, Hiroyuki Kurashina, Takao Sawabe, Junichi Yoshio | 2004-08-17 |
| 6760540 | Information storage medium and apparatus for reproducing the same | Kaoru Yamamoto, Takao Sawabe, Hidehiro Ishii, Shozo Ema | 2004-07-06 |
| 6741797 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Akihiro Tozaki, Hidehiro Ishii, Junichi Yoshio, Hiroshi Nakamura, Takao Sawabe +2 more | 2004-05-25 |
| 6687211 | Information record medium on which audio information differing in recording methods are recorded and apparatus for reproducing the same | Takao Sawabe, Kaoru Yamamoto, Hidehiro Ishii, Shozo Ema, Yoshinori Hasegawa | 2004-02-03 |