Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6663934 | Optical information recording medium | Noboru Yamada | 2003-12-16 |
| 6611491 | Optical recording medium having dual recording layers | Kenichi Nishiuchi, Nobuo Akahira | 2003-08-26 |
| 6587420 | Recording and reproducing method for optical information recording medium and optical information recording medium | Noboru Yamada, Nobuo Akahira, Kenichi Nishiuchi | 2003-07-01 |
| 6514591 | Optical information recording medium | Noboru Yamada | 2003-02-04 |