Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6891662 | Optical amplifier and method for amplifying wavelength multiplexed transmission signal light | Yasushi Sugaya, Etsuko Hayashi, Terumi Chikama, Norifumi Shukunami | 2005-05-10 |
| 5508842 | Optical amplifier | Keiko Takeda, Sakae Yoshizawa, Kazuya Sasaki, Kenji Tagawa | 1996-04-16 |