Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6667937 | Optical information recording medium and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Naoyasu Miyagawa, Eiji Ohno | 2003-12-23 |
| 6611491 | Optical recording medium having dual recording layers | Kenichi Nishiuchi, Ken'ichi Nagata | 2003-08-26 |
| 6587420 | Recording and reproducing method for optical information recording medium and optical information recording medium | Ken'ichi Nagata, Noboru Yamada, Kenichi Nishiuchi | 2003-07-01 |
| 6532209 | Optical information recording medium and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Naoyasu Miyagawa, Eiji Ohno | 2003-03-11 |