Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8842689 | Cross cluster extension mobility in internet-protocol telephony | Atul Trasi, Daniel Keller, Susan M. Sauter, Chunfeng Huang | 2014-09-23 |
| 8582741 | Unification of rosters in a communication system | Chris Pearce, Ping Ni | 2013-11-12 |
| 8254552 | System and method for providing a recovery mode in a session initiation protocol (SIP) environment | David Harton, Richard A. Frisk, Clint D. Entrop | 2012-08-28 |
| 7995559 | System and method for interworking communication protocols to provide supplementary services | Joanna Chen, Stephen S. Hua, Shipeng Li, Ping Ni, Christopher E. Pearce +1 more | 2011-08-09 |
| 7983660 | Mobile telephone device identifying whether incoming wireless call anchored by an enhanced services server | Hemendra Rana | 2011-07-19 |
| 7974277 | System and method for routing calls | Scott Henning, Christopher E. Pearce, James Williams | 2011-07-05 |
| 7839879 | Method and system for supporting cross cluster extension mobility in internet-protocol telephony | Atul Trasi, Daniel Keller, Susan M. Sauter, Chunfeng Huang | 2010-11-23 |
| 7778274 | System and method for providing a compatibility feature in a session initiation protocol (SIP) environment | Tripti Agarwal, David R. Daiker, Richard A. Frisk, David Wayne Mills, John K. Restrick, Jr. | 2010-08-17 |
| 7729482 | Method and system for providing communication protocol interoperability | John K. Restrick, Jr., Tripti Agarwal, Rongxuan V. Chen, David Wayne Mills | 2010-06-01 |
| 7701971 | System and method for providing a compatibility feature in a session initiation protocol (SIP) environment | Tripti Agarwal, David R. Daiker, Richard A. Frisk, David Wayne Mills, John K. Restrick, Jr. | 2010-04-20 |
| 5862481 | Inter-technology roaming proxy | Sanjay Kulkarni, Samir Kaji, Susan Iskra, Jin Chen, James Bender +1 more | 1999-01-19 |