Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9690677 | Transmission device, transmission system, and transmission method | NOBUYUKI FUKUCHI, Kouji Kurihara, Tsutomu Chikazawa, Yasushi Tateno | 2017-06-27 |
| 9602395 | Apparatus and method for switching communication channels having redundant configuration | Toshiyuki Sakamoto, Hiroshi Fukaya, Tsutomu Chikazawa, Kouji Kurihara | 2017-03-21 |
| 8775690 | Control apparatus, switch, optical transmission apparatus, and control method | — | 2014-07-08 |