Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8832307 | Telephony system, connection control method, connection control device and recording medium | Tomoyuki Furutono, Akio Koga, Ryuji Oda, Masahiro Tanaka, Kaori Chigusa +3 more | 2014-09-09 |
| 8300633 | Network quality monitoring device and method for internet services involving signaling | Ryuji Oda, Kazunori Umezaki, Katsuyuki Fujiyoshi | 2012-10-30 |
| 8189764 | Server for transferring a communication message | Ryuji Oda | 2012-05-29 |
| 7882241 | Communication management apparatus and communication management method | — | 2011-02-01 |
| 6674763 | Method and system of seizing communication channel enhancing usability of remaining communication channels | Seiji Tokunaga, Kazuhiro Muraoka, Norihito Nishimoto | 2004-01-06 |