Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7206486 | Optical amplification fiber, optical fiber amplifier, and optical communication system | Keiichi Aiso | 2007-04-17 |
| 7079738 | Method for manufacturing a glass doped with a rare earth element and fiber for optical amplification using the same | Toshihiro Nakamura, Keiichi Aiso, Takeshi Yagi, Hisashi Koaizawa | 2006-07-18 |