| Essentiality update 14-03-2018 |
| US201715426805 |
| 07/02/2017 |
US9832236 B2 28/11/2017 US2017149849 A1 25/05/2017 |
| COLLABORATIVE SESSION CONTROL TRANSFER AND INTER-DEVICE TRANSFER IN INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM |
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| UNITED STATES |
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| US20090259818P;US20090264052P;US20100943327;US201715426805 |
| INTERDIGITAL PATENT HOLDINGS INC [US] |
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