Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6952309 | Optical amplifier and optical amplification method | Tetsufumi Tsuzaki, Masayuki Nishimura, Hitoshi Hatayama, Eisuke Sasaoka | 2005-10-04 |
| 6898002 | Optical device, optical module, optical amplifier, and optical transmission system | Kenichiro Takahashi, Tomomi Sano, Akira Inoue, Toshikazu Shibata | 2005-05-24 |