Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6574180 | Multilayer optical disk and method of initializing the same | Koichi Yasuda, Takeshi Yamasaki, Tomomi Yukumoto | 2003-06-03 |
| 6511788 | Multi-layered optical disc | Koichi Yasuda | 2003-01-28 |