Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862440 | Optical head with optical beam control using acoustic wave device | Norifumi Miyamoto, Nobuyoshi Tsuboi, Satoshi Shimada, Hiroshi Sasaki, Hiroaki Koyanagi +1 more | 1989-08-29 |
| 4860050 | Developing replenisher material for use in image forming device | Tsuneo Kurotori, Manabu Mochizuki, Kenzo Ariyama, Shinichi Kuramoto, Yoshihiro Sugiyama +3 more | 1989-08-22 |
| 4841514 | Optical recording method and apparatus using two fight spots | Nobuyoshi Tsuboi, Atsumi Watanabe, Satoshi Shimada, Hiroshi Sasaki | 1989-06-20 |
| 4811328 | Optical recording and reproducing device | Tetsuo Ito, Hiroshi Sasaki, Satoshi Shimada, Norifumi Miyamoto, Nobuyoshi Tsuboi +2 more | 1989-03-07 |
| 4808313 | Liquid separation membrane for pervaporation | Akira Michizuki, Hisashi Ogawara, Syuzo Yamashita | 1989-02-28 |