Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866687 | Optical disc access method and optical disk storage using coarse and fine actuators | Masuo Kasai, Kazuo Shigematsu, Toshimitsu Kaku, Masahiro Takasago | 1989-09-12 |
| 4866692 | Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type | Atsushi Saito, Hisataka Sugiyama, Wasao Takasugi | 1989-09-12 |
| 4866688 | Composite tracking servo system for optical disc apparatus with track offset correction | Masatoshi Ohtake, Seiji Yonezawa, Toshiaki Tsuyoshi, Kazuo Ichino, Yukio Fukui +2 more | 1989-09-12 |
| 4855991 | Optical disk having track offset detection areas | Toshimitsu Kaku, Yoshito Tsunoda, Shigeru Nakamura | 1989-08-08 |
| 4835759 | Method and apparatus for compensating variation of read data in an optical data storage | Atsushi Saito, Hisataka Sugiyama, Kazuo Shigematsu, Wasao Takasugi | 1989-05-30 |
| 4835756 | Optical memory apparatus using an optical disc having guide-grooves of V-shape and predetermined optical depth and access method therefor | Toshimitsu Kaku, Shigeru Nakamura, Masaru Ito, Kazuo Shigematsu, Yoshito Tsunoda | 1989-05-30 |
| 4807210 | Optical information processing apparatus | Toshimitsu Kaku, Kazuo Shigematsu, Yoshito Tsunoda | 1989-02-21 |
| 4802153 | Optical information processor and method for accessing rotating record carrier utilizing acousto-optic light deflector including holding a focus error signal during track jumping | Keiji Kataoka, Yoshito Tsunoda | 1989-01-31 |