Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703856 | Optical head and optical data recording and reproducing apparatus having the same | Hideki Hayashi, Sadao Mizuno, Noboru Ito, Kenichiro Urairi | 1997-12-30 |
| 5687153 | Optical head device and optical information apparatus using a lithium niobate hologram with divisional areas to diffract light to corresponding photo detector areas | Seiji Nishino, Shin-ichi Kadowaki, Hiroaki Yamamoto, Makoto Kato, Tetsuo Saimi | 1997-11-11 |
| 5648951 | Movable optical head integrally incorporated with objective lens and hologram element | Makoto Kato, Shin-ichi Kadowaki, Yoshikazu Hori, Seiji Nishino, Tetsuo Saimi | 1997-07-15 |
| 5644413 | Optical head for adjusting a positional relation between the information medium and the optical head | Sadao Mizuno, Makoto Kato, Hidenori Wada, Seiji Nishino | 1997-07-01 |
| 5594713 | Optical pickup head apparatus | Seiji Nishino, Makoto Kato, Kaoru Matsuda | 1997-01-14 |