Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9887772 | Transmission device, transmission network system, and path delay measuring method | Naoya Okada, Yasuyuki Mitsumori, Tsuyoshi Ohigawa, Kenichi Yajima | 2018-02-06 |
| 7239649 | Transmission system | Koji Takeguchi, Nobuhiro Rikitake, Hideki Matsui, Hirotaka Morita | 2007-07-03 |
| 7024121 | Optical clock signal distribution system in WDM network | Nobuhiro Rikitake, Hirotaka Morita, Koji Takeguchi, Hideki Matsui | 2006-04-04 |
| 6567422 | Network synchronization controller and timing loop prevention method | Koji Takeguchi, Hirotaka Morita, Nobuhiro Rikitake, Ken Mizukura | 2003-05-20 |