Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8576273 | Multipoint control unit cascaded system, communications method and device | Dong Li | 2013-11-05 |
| 8392535 | Method, device and system for controlling multichannel cascade between two media control servers | Qingfeng Chen, Lingfeng Xu | 2013-03-05 |
| 8032934 | Network security system and the method thereof | Xianyi Chen, Ziqiang Wei, Jiaoli Wu, Lingfeng Xu | 2011-10-04 |