Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4990388 | Optical information recording medium | Yuji Arai, Yuaki Shin, Takashi Ishiguro | 1991-02-05 |
| 4940618 | Optical information recording medium | Yuji Arai, Yuaki Shin, Takashi Ishiguro | 1990-07-10 |
| 4920359 | Optical information recording medium having protective layer | Yuji Arai, Yuaki Shin, Takashi Ishiguro | 1990-04-24 |