Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6801720 | Optical signal quality supervisory device | Takashi Mizuochi, Yojiro Osaki, Aritomo Uemura, Hiroshi Ichibangase, Kiwami Matsushita +4 more | 2004-10-05 |
| 6782201 | Four fiber ring network optical switching circuit using branched inputs | Shu Yamamoto, Yasuyuki Nagao, Tomohiro Otani | 2004-08-24 |
| 6741810 | Signal demultiplexing device and signal routing device in high speed transmission system | Tomohiro Otani, Shu Yamamoto | 2004-05-25 |