Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8842689 | Cross cluster extension mobility in internet-protocol telephony | Daniel Keller, Susan M. Sauter, Ho Bao, Chunfeng Huang | 2014-09-23 |
| 8311036 | Device based emergency services for cross cluster extension mobility | Daniel Keller | 2012-11-13 |
| 7839879 | Method and system for supporting cross cluster extension mobility in internet-protocol telephony | Daniel Keller, Susan M. Sauter, Ho Bao, Chunfeng Huang | 2010-11-23 |