Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879703 | Magneto-optic memory apparatus with defect detection of recording medium during erasing operation | Toshimitsu Kaku, Yoshito Tsunoda | 1989-11-07 |
| 4866687 | Optical disc access method and optical disk storage using coarse and fine actuators | Masuo Kasai, Takeshi Maeda, Toshimitsu Kaku, Masahiro Takasago | 1989-09-12 |
| 4835756 | Optical memory apparatus using an optical disc having guide-grooves of V-shape and predetermined optical depth and access method therefor | Toshimitsu Kaku, Takeshi Maeda, Shigeru Nakamura, Masaru Ito, Yoshito Tsunoda | 1989-05-30 |
| 4835759 | Method and apparatus for compensating variation of read data in an optical data storage | Atsushi Saito, Takeshi Maeda, Hisataka Sugiyama, Wasao Takasugi | 1989-05-30 |
| 4819242 | Semiconductor laser driver circuit | Toshimitsu Kaku | 1989-04-04 |
| 4817053 | Apparatus for storing and retrieving information using an electron beam | Tadashi Ikeda, Yasushi Miyauchi, Motoyasu Terao, Tetsuya Nishida, Shinkichi Horigome +2 more | 1989-03-28 |
| 4806952 | Information recording apparatus for recording/reproducing information by irradiating an information recording medium with an energy beam | Tetsuya Nishida, Motoyasu Terao, Yasushi Miyauchi, Shinkichi Horigome, Norio Ohta +2 more | 1989-02-21 |
| 4807210 | Optical information processing apparatus | Toshimitsu Kaku, Yoshito Tsunoda, Takeshi Maeda | 1989-02-21 |