| 9026160 |
Method and system for priority handling of dispatch call requests |
— |
2015-05-05 |
| 8059613 |
Implementing redirect on interoperability gateway for CDMA terminated PTT calls |
Safwan A. Khan, Trinh D. Vu |
2011-11-15 |
| 8036648 |
System and method for operating a user functionality in a mobile communications device |
Safwan A. Khan |
2011-10-11 |
| 8027316 |
Efficient selection of interoperability gateway for CDMA terminated PTT calls |
Safwan A. Khan, Trinh D. Vu |
2011-09-27 |
| 7920862 |
System and method for improved IMEI registration |
Manish Sharma, Anthony Wei-Hsia Soong |
2011-04-05 |
| 7844256 |
Enabling dispatch calls for long-distance-restricted subscribers |
— |
2010-11-30 |
| 7822437 |
System and method for dispatch roaming registration |
Safwan A. Khan, Ojas T. Choksi, Arun Manroa |
2010-10-26 |
| 7813737 |
Integrated digital enhanced network migrated subscriber mapping |
— |
2010-10-12 |
| 7751797 |
Systems and methods for providing presence information |
— |
2010-07-06 |
| 7738856 |
Systems and methods for prepaid dispatch communications |
— |
2010-06-15 |
| 7684817 |
Wireless communication system having a signaling gateway serving as an intermediary between a dispatch call controller and a base station |
— |
2010-03-23 |
| 7636580 |
Method and apparatus for handling integrated digital enhanced network calling restrictions |
Safwan A. Khan |
2009-12-22 |
| 7574227 |
System and method for dispatch calling using personal telephone numbers |
— |
2009-08-11 |
| 7437171 |
System and method for long distance dispatch calling restrictions |
Arun Manroa |
2008-10-14 |
| 7142856 |
System and method for providing subscriber presence information in a dispatch network |
— |
2006-11-28 |
| 7139573 |
System and method for improved IMEI registration |
Manish Sharma, Anthony Wei-Hsia Soong |
2006-11-21 |
