Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866688 | Composite tracking servo system for optical disc apparatus with track offset correction | Masatoshi Ohtake, Seiji Yonezawa, Toshiaki Tsuyoshi, Yukio Fukui, Takashi Takeuchi +2 more | 1989-09-12 |