Issued Patents 2011
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8023926 | Offline charging for sessions over a 3GPP network and a WLAN access network | Yigang Cai | 2011-09-20 |
| 7962120 | Allocation of internet protocol (IP) multimedia subsystem (IMS) charges | Yigang Cai | 2011-06-14 |
| 7945241 | Charging for roaming users in IMS networks | Yigang Cai | 2011-05-17 |
| 7894859 | Privacy protection in network-based phonebooks | Yigang Cai | 2011-02-22 |