Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8185087 | Emergency 911 data messaging | Donald L. Mitchell, Jr., Yinjun Zhu, Myron D'Souza | 2012-05-22 |
| 8059789 | Automatic location identification (ALI) emergency services pseudo key (ESPK) | John Gordon Hines, Jonathan Croy | 2011-11-15 |
| 7929530 | Ancillary data support in session initiation protocol (SIP) messaging | Yinjun Zhu | 2011-04-19 |
| 7912446 | Solutions for voice over internet protocol (VoIP) 911 location services | Yinjun Zhu, Richard Dickinson, Steven P. Helme | 2011-03-22 |
| 7903791 | Enhanced E911 location information using voice over internet protocol (VoIP) | Richard Dickinson, Steven P. Helme | 2011-03-08 |
| 7260186 | Solutions for voice over internet protocol (VoIP) 911 location services | Yinjun Zhu, Richard Dickinson, Steven P. Helme | 2007-08-21 |
| 6940950 | Enhanced E911 location information using voice over internet protocol (VoIP) | Richard Dickinson, Steven P. Helme | 2005-09-06 |