Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9705903 | Call control device, call control method, and call control system | Ryouji Nakamatsu, Hiromitsu Kajiyama, Hideo Okawa, Akio Koga | 2017-07-11 |
| 9621599 | Communication system, communication method, and call control server | Ryouji Nakamatsu, Hiromitsu Kajiyama | 2017-04-11 |