Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6577591 | Optical recording medium | Akiko Hirao, Hideyuki Nishizawa, Kazuki Matsumoto | 2003-06-10 |
| 6545971 | Information recording/reproducing system for recording/reproducing information in three-dimensional recording medium of a light passing-through type | Hideyuki Nishizawa, Akiko Hirao | 2003-04-08 |