Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9426021 | Communication failover in a distributed network | Harsh V. Mendiratta, Chandra Ravipati, Christopher D. Baldwin, Mark T. Rolfs | 2016-08-23 |
| 6870807 | Method and apparatus for suppressing music on hold | Norman C. Chan | 2005-03-22 |
| 5867568 | Coverage of redirected calls | Anthony T. Ackerman, Richard K. Lee, Barry E. Weiss | 1999-02-02 |
| 5521970 | Arrangement for extending call-coverage across a network of nodes | Donna W. Herrick | 1996-05-28 |