Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6944116 | Optical information recording medium | Naomasa Nakamura, Keiichiro Yusu, Sumio Ashida | 2005-09-13 |
| 6842419 | Optical information recording medium and optical disk drive | Naomasa Nakamura, Sumio Ashida, Keiichiro Yusu, Noritake Oomachi | 2005-01-11 |