Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7103644 | Systems for an integrated data network voice-oriented service and non-voice-oriented service converged creation and execution environment | Li Zhang, Tom Anschutz, Jeffrey Cassanova, Robert C. Collicott | 2006-09-05 |
| 6661785 | Method and apparatus for providing internet call waiting with voice over internet protocol | Li Zhang, Jeffrey Cassanova, Robert B. Collicott | 2003-12-09 |