Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5327489 | Method and apparatus for monitoring a network for customer signaling during the term of a call | Thomas W. Anderson, Elliott Baral, Ronald S. Byrd, Bernard W. Fecht, David S. Isenberg +3 more | 1994-07-05 |
| 4982421 | Virtual private line service | David A. Redberg | 1991-01-01 |