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 | Junji Hirokane, Hiroyuki Katayama, Junichiro Nakayama, Kenji Ohta | 1994-09-13 |
| 5335220 | Optical recording element and driving system | Kenji Ohta, Tetsuya Inui, Hiroyuki Katayama, Akira Takahashi, Junji Hirokane +2 more | 1994-08-02 |
| 5331625 | Optical disc with antistatic coating containing tin oxide and phosphorous | Toshikazu Nagaura, Hirotoshi Takemori, Kenji Ohta, Hiroo Yoshidome | 1994-07-19 |
| 5286583 | Method of manufacturing a photomask for an optical memory | Junji Hirokane, Tetsuya Inui, Kenji Ohta | 1994-02-15 |