Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684778 | Initialization process for a phase change recording medium with a zero level drop in flash light emission | Katsumi Kawahara, Shigeaki Furukawa | 1997-11-04 |
| 5681632 | Optical information recording medium | Hideki Kitaura, Tetsuya Akiyama, Takeo Ohta, Ken'ichi Nagata, Katsumi Kawahara | 1997-10-28 |
| 5663852 | Disk drive device | Kazuyoshi Fujimori | 1997-09-02 |
| 5635267 | Optical information recording medium of phase change type having variably grooved tracks depending on their radial locations | Kenichi Nishiuchi, Shigeaki Furukawa, Nobuo Akahira, Eiji Ohno, Kenichi Nagata +1 more | 1997-06-03 |