Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868821 | Optical pickup which includes a single objective lens having magnification equal to or greater than 3 and equal to or smaller than 5 | Masashi Ito, Hiroyuki Nakamura, Hiroshi Yasuda | 1989-09-19 |