Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5347510 | Method of manufacturing a master plate where its guide groove has an inclined angle | Hiroyuki Katayama, Junichiro Nakayama, Michinobu Mieda, Kenji Ohta | 1994-09-13 |
| 5335220 | Optical recording element and driving system | Kenji Ohta, Tetsuya Inui, Hiroyuki Katayama, Akira Takahashi, Yukinori Nishitani +2 more | 1994-08-02 |
| 5293359 | Magnetic recording and reproducing apparatus having a ferrimagnetic recording medium, a magnetic head and first and second light sources | Kenji Ohta, Akira Takahashi, Junsaku Nakajima, Yoshiteru Murakami | 1994-03-08 |
| 5286583 | Method of manufacturing a photomask for an optical memory | Tetsuya Inui, Michinobu Mieda, Kenji Ohta | 1994-02-15 |