Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9578127 | Method and apparatus for call processing for SIP and ISUP interworking | Chaoxin Qiu, Richard L. Khan | 2017-02-21 |
| 8798095 | Method and apparatus for call processing for SIP and ISUP interworking | Chaoxin Qiu, Richard L. Khan | 2014-08-05 |