Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9705903 | Call control device, call control method, and call control system | Ryouji Nakamatsu, Shigehiko Hirata, Hideo Okawa, Akio Koga | 2017-07-11 |
| 9621599 | Communication system, communication method, and call control server | Ryouji Nakamatsu, Shigehiko Hirata | 2017-04-11 |
| 7609692 | Method and apparatus for controlling route in network | Jiro Nakata, Nobuo Shirai | 2009-10-27 |
| 6961331 | IP gateway apparatus | Seiji Tokunaga, Masahiko Nagafuji, Kenji Yamada | 2005-11-01 |
| 6567516 | Method and device for controlling affiliation of remote line-collection device with switch | Hirofumi Mitome, Akihiro Horiuchi, Shunichi Shibata, Kenji Maeda | 2003-05-20 |