Issued Patents All Time
Showing 76–81 of 81 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8181526 | Acoustic emission test sensor fixing device | Heping Xie, Jin Xu | 2012-05-22 |
| 8111823 | Method, device and system for realizing universal personal number ring back tone service | Qifeng Ma | 2012-02-07 |
| 7974403 | Method and system for called party to provide indication information to calling party | Jun Wang, Yan Li, Yi Zhang | 2011-07-05 |
| 7624647 | Spring supported lower clamper for direct tensile test | Jin Xu, Heping Xie | 2009-12-01 |
| 7502461 | Echo cancellation in a communication network | — | 2009-03-10 |
| 6792106 | Echo canceller and method of echo cancellation using an NLMS algorithm | — | 2004-09-14 |