Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6775838 | Optical information medium and its testing method | Tsuyoshi Komaki, Hideki Hirata | 2004-08-10 |
| 6731591 | Optical information medium | Tsuyoshi Komaki | 2004-05-04 |
| 6680899 | Optical information medium | Tsuyoshi Komaki, Hideki Hirata, Toshifumi Tanaka | 2004-01-20 |