Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7458084 | Methods and systems for converged service creation and execution environment applications | Li Zhang, Jeffrey Cassanova | 2008-11-25 |
| 7342919 | Method and apparatus for providing internet call waiting with voice over internet protocol | Li Zhang, Jeffrey Cassanova, Alan Blackburn | 2008-03-11 |
| 6981263 | Methods and systems for converged service creation and execution environment applications | Li Zhang, Jeffrey Cassanova | 2005-12-27 |
| 6661785 | Method and apparatus for providing internet call waiting with voice over internet protocol | Li Zhang, Jeffrey Cassanova, Alan Blackburn | 2003-12-09 |