Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872152 | Light spot position control system and method by sampled servo | Toshiaki Tsuyoshi, Masatoshi Ohtake, Wasao Takasugi | 1989-10-03 |
| 4866688 | Composite tracking servo system for optical disc apparatus with track offset correction | Masatoshi Ohtake, Toshiaki Tsuyoshi, Kazuo Ichino, Yukio Fukui, Takashi Takeuchi +2 more | 1989-09-12 |
| 4857744 | Optical projection printing apparatus wherein wafer mark has a grating pitch in the sagittal plane of the first optical system | Keiji Kataoka, Toshiei Kurosaki, Soichi Katagiri | 1989-08-15 |
| 4847822 | Optical information recording and reproducing apparatus with tracking control by sampling | Wasao Takasugi, Toshiaki Tsuyoshi, Masatoshi Ohtake | 1989-07-11 |