Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687153 | Optical head device and optical information apparatus using a lithium niobate hologram with divisional areas to diffract light to corresponding photo detector areas | Yoshiaki Komma, Seiji Nishino, Shin-ichi Kadowaki, Hiroaki Yamamoto, Makoto Kato | 1997-11-11 |
| 5648951 | Movable optical head integrally incorporated with objective lens and hologram element | Makoto Kato, Yoshiaki Komma, Shin-ichi Kadowaki, Yoshikazu Hori, Seiji Nishino | 1997-07-15 |
| 5640380 | Optical head with a translucent plate to split a light beam | Yasuo Nishihara, Masatoshi Yajima | 1997-06-17 |