Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6603587 | Optical amplifier repeater | Ryu Yokoyama, Shuji Yamashita, Yasuhiro Aoki | 2003-08-05 |
| 6600595 | Multi-stage optical amplifier apparatus having fiber grating with a cutoff wavelength less than the pump light wavelength | Ryuji Aida | 2003-07-29 |