Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8855697 | Method for establishing a push-to-talk communication link | Pavel Dostal | 2014-10-07 |
| 8509120 | Preserving mid-call state in IMS centralized services sessions | Ralf Keller | 2013-08-13 |
| 8374173 | Packet switched to circuit switched access handovers in an IMS architecture | Fredrik Lindholm, Jan Holm | 2013-02-12 |
| 8099089 | Method, user equipment and software product for media stream transfer between devices | Adamu Haruna, Miguel Garcia, Arto Leppisaari | 2012-01-17 |