Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6771587 | Optical information recording medium with plural information layers | Kenichi Nishiuchi, Ken'ichi Nagata | 2004-08-03 |
| 6744724 | Recording and reproducing method for optical information recording medium and optical information recording medium | Ken'ichi Nagata, Noboru Yamada, Kenichi Nishiuchi | 2004-06-01 |
| 6707776 | Recording and reproducing method of optical information recording medium | Ken'ichi Nagata, Kenichi Nishiuchi, Eiji Ohno, Kenji Narumi | 2004-03-16 |
| 6697313 | Optical information recording and reproducing system with overwrite capability and recording medium for use therewith | Ken'ichi Nagata, Kenichi Nishiuchi, Eiji Ohno, Kenji Narumi | 2004-02-24 |
| 6683739 | Optical information recording and reproducing system with overwrite capability and recording medium for use therewith | Ken'ichi Nagata, Kenichi Nishiuchi, Eiji Ohno, Kenji Narumi | 2004-01-27 |