Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5526459 | Erbium-doped silica optical fiber preform | Akira Wada, Tetsuya Sakai, Tetsuo Nozawa, Ryozo Yamauchi | 1996-06-11 |
| 5474588 | Solution doping of a silica preform with erbium, aluminum and phosphorus to form an optical fiber | Akira Wada, Tetsuya Sakai, Tetsuo Nozawa, Ryozo Yamauchi | 1995-12-12 |
| 5267339 | Optical fiber having a core with a repeatedly changing constitutional parameter | Ryozo Yamauchi, Akira Wada, Tetsuo Nozawa, Tetsuya Sakai | 1993-11-30 |