Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7929530 | Ancillary data support in session initiation protocol (SIP) messaging | Roger S. Marshall | 2011-04-19 |
| 7912446 | Solutions for voice over internet protocol (VoIP) 911 location services | Richard Dickinson, Roger S. Marshall, Steven P. Helme | 2011-03-22 |
| 7890102 | User plane location based service using message tunneling to support roaming | — | 2011-02-15 |