Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7796743 | Method and system for implementing ring back tone | Yong-Bae Song, Qian Yu, Bing Zhang | 2010-09-14 |
| 7627107 | Method and system for invoking the service in the intelligent network | Qian Yu | 2009-12-01 |