Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4767202 | Objective lens system for optical recording type disks | Kazuyoshi Hata | 1988-08-30 |
| 4765723 | Objective lens system for optical reading device | — | 1988-08-23 |
| 4741606 | Objective lens system for optical recording and reading device | — | 1988-05-03 |