| 9584661 |
Extended efficient usage of emergency services keys |
Gerhard Geldenbott, Yinjun Zhu, Victor Burton |
2017-02-28 |
| 9420444 |
Enhanced E911 network access for call centers |
Richard Dickinson, Jonathan Croy |
2016-08-16 |
| 8885796 |
Extended efficient usage of emergency services keys |
Gerhard Geldenbott, Yinjun Zhu, Victor Burton |
2014-11-11 |
| 8682286 |
Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging |
Richard Dickinson, Jonathan Croy |
2014-03-25 |
| 8532266 |
Efficient usage of emergency services keys |
Gerhard Geldenbott, Yinjun Zhu |
2013-09-10 |
| 8467320 |
Voice over internet protocol (VoIP) multi-user conferencing |
Jon Croy, Darrin P. Johnson, Kathleen Clare Lendvay |
2013-06-18 |
| 8406728 |
Enhanced E911 network access for call centers |
Richard Dickinson, Jonathan Croy |
2013-03-26 |
| 8369825 |
Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging |
Richard Dickinson, Jonathan Croy |
2013-02-05 |
| 8249589 |
Mobile based area event handling when currently visited network does not cover area |
Yinjun Zhu |
2012-08-21 |
| 8208605 |
Extended efficient usage of emergency services keys |
Gerhard Geldenbott, Yinjun Zhu, Victor Burton |
2012-06-26 |
| 8150363 |
Enhanced E911 network access for call centers |
Richard Dickinson, Jonathan Croy |
2012-04-03 |
| 8150364 |
Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging |
Richard Dickinson, Jonathan Croy |
2012-04-03 |
| 8059789 |
Automatic location identification (ALI) emergency services pseudo key (ESPK) |
Jonathan Croy, Roger S. Marshall |
2011-11-15 |
| 7907551 |
Voice over internet protocol (VoIP) location based 911 conferencing |
Jon Croy, Darrin P. Johnson |
2011-03-15 |
| 7764961 |
Mobile based area event handling when currently visited network does not cover area |
Yinjun Zhu |
2010-07-27 |
| 7626951 |
Voice Over Internet Protocol (VoIP) location based conferencing |
Jon Croy |
2009-12-01 |