Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8462767 | Internet protocol compliant private branch electronic exchange and a method for redundantly configuring terminal interfaces | Yasuhiro Watanabe | 2013-06-11 |
| 8166293 | Client server distributed system, client apparatus, server apparatus, and message encryption method used therefor | Yasuhiro Watanabe | 2012-04-24 |
| 7965846 | Client distributed system and inter-client RTP encrypting method | Yasuhiro Watanabe | 2011-06-21 |
| 7668155 | IP telephony system, VoIP terminal, and method and program for reproducing hold sound or audible sound used therein | Michiko Omori, Yasuhiro Watanabe | 2010-02-23 |
| 7580402 | Internet protocol compliant private branch electronic exchange and a method expanding the number of controlled terminal ports | Yasuhiro Watanabe | 2009-08-25 |
| 7440566 | Internet protocol compliant private branch electronic exchange and a method for redundantly configuring terminal interfaces | Yasuhiro Watanabe | 2008-10-21 |