Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5341362 | Optical memory device having guide tracks shaped for increasing the quality of information signals | Yoshikazu Fujii, Toshihisa Deguchi, Kenji Ohta | 1994-08-23 |
| 5335220 | Optical recording element and driving system | Kenji Ohta, Hiroyuki Katayama, Akira Takahashi, Junji Hirokane, Yukinori Nishitani +2 more | 1994-08-02 |
| 5286583 | Method of manufacturing a photomask for an optical memory | Junji Hirokane, Michinobu Mieda, Kenji Ohta | 1994-02-15 |