Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6597861 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Akihiro Tozaki, Hidehiro Ishii, Hiroshi Nakamura, Takao Sawabe, Kaoru Yamamoto +1 more | 2003-07-22 |
| 6574187 | Audio information recording medium and audio information reproducing apparatus | Hidehiro Ishii, Takao Sawabe, Shozo Ema, Kaoru Yamamoto, Yoshinori Hasegawa | 2003-06-03 |