Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5213947 | Optical recording medium | Yutaka Ueda | 1993-05-25 |
| 4915997 | Optical information recording medium | Tetsu Yamamuro, Yutaka Ueda | 1990-04-10 |
| 4861637 | Optical information recording medium | Yutaka Ueda | 1989-08-29 |