Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8571020 | Session initiation protocol (SIP) based voice over internet protocol (VoIP) system and method of registering SIP terminal therein | — | 2013-10-29 |
| 7474665 | Apparatus and method for compulsively receiving multi-calls over internet protocol phones in internet protocol telephony system | — | 2009-01-06 |