Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691092 | Method for producing optical element | Masanobu Ninomiya, Ryojiro Akashi, Takashi Morikawa | 1997-11-25 |
| 5670083 | Optical element and process for producing the same | Ryojiro Akashi, Masanobu Ninomiya, Takashi Morikawa | 1997-09-23 |
| 5671211 | Data recording medium | Ryojiro Akashi, Takashi Morikawa, Masanobu Ninomiya | 1997-09-23 |
| 5654046 | Optical element | Masanobu Ninomiya, Ryojiro Akashi, Takashi Morikawa | 1997-08-05 |