Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833664 | Servo system for scanning the same track circumference of a spiral track on a disc shaped recording medium | Mirsuro Moriya, Hiroyuki Yamaguchi | 1989-05-23 |
| 4807206 | Track jump detection system | Mitsuro Moriya, Toshiji Kanamaru, Hiroyuki Yamaguchi, Katsuya Watanabe | 1989-02-21 |