Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11134154 | Call-out method and apparatus having immediate callback function | Guanshi Li | 2021-09-28 |
| 8804928 | System and method for allowing virtual private network users to obtain presence status and/or location of others on demand | Xiaohong Si, Tao Cui | 2014-08-12 |