Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4740947 | Dual surface optical memory disc | Kenji Ohta, Akira Takahashi, Hiroyuki Katayama, Yoshiteru Murakami | 1988-04-26 |
| 4719137 | Magneto-optic memory element | Kenji Ohta, Akira Takahashi, Hiroyuki Katayama, Yoshiteru Murakami | 1988-01-12 |