Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862440 | Optical head with optical beam control using acoustic wave device | Norifumi Miyamoto, Yoshio Sato, Nobuyoshi Tsuboi, Satoshi Shimada, Hiroshi Sasaki +1 more | 1989-08-29 |
| 4811328 | Optical recording and reproducing device | Tetsuo Ito, Hiroshi Sasaki, Yoshio Sato, Satoshi Shimada, Norifumi Miyamoto +2 more | 1989-03-07 |