Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6771904 | Optical transmission system and optical channel available quality measuring method | Akira Sasaki, Shigeru Shikii, Naomi Oohashi, Katsuhiro Ishimura | 2004-08-03 |
| 6018406 | Optical repeater and optical transmission system | Takashi Watanabe | 2000-01-25 |