Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5583928 | Detecting local exchange failure and resultant control of a communications network | Brian C. Tester, Donald Fisk | 1996-12-10 |
| 5509063 | Method of controlling a telecommunications network using call gapping | Ian Barry Crabtree | 1996-04-16 |