Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6625187 | Semiconductor optical device and method of manufacturing the same | Nobuyuki Ikoma, Akira Ishida, Shigenori Takagishi, Mitsuo Takahashi, Tsukuru Katsuyama | 2003-09-23 |
| 6512613 | WDM transmission repeater, WDM transmission system and WDM transmission method | Shigeru Tanaka, Masayuki Nishimura, Yasunori Murakami | 2003-01-28 |
| 6504647 | Optical fiber amplifier, a method of amplifying optical signals, optical communications system | — | 2003-01-07 |