Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887254 | Optical disk drive device for positioning a carriage to a retract position | Keiji Nakatsu, Katsuaki Kamitsu | 1989-12-12 |
| 4835752 | Device for driving and controlling optical head for use in optical disk system | Keiji Nakatsu, Shigeo Hayashi, Osamu Itou, Isao Watanabe, Kunimaro Tanaka | 1989-05-30 |