Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6487151 | Optical information recording and reproducing system with overwrite capability and recording medium for use therewith | Ken'ichi Nagata, Kenichi Nishiuchi, Eiji Ohno, Kenji Narumi | 2002-11-26 |
| 6456584 | Optical information recording medium comprising a first layer having a phase that is reversibly changeable and a second information layer having a phase that is reversibly changeable | Ken'ichi Nagata, Kenichi Nishiuchi, Noboru Yamada | 2002-09-24 |
| 6434095 | Optical information recording medium, manufacturing method therefor, manufacturing apparatus therefor, and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Ken'ichi Nagata | 2002-08-13 |
| 6411592 | OPTICAL INFORMATION RECORDING MEDIUM HAVING CONVEX AND CONCAVE PORTIONS FOR RECORDING INFORMATION AND AN ADDITIONAL PORTION FOR CONDITION DATA, AND RECORDING AND REPRODUCING APPARATUS FOR USING THE MEDIUM | Kenichi Nishiuchi, Naoyasu Miyagawa, Eiji Ohno | 2002-06-25 |