Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6760849 | Event initiation bus and associated fault protection for a telecommunications device | Brent K. Parrish, John J. Fernald | 2004-07-06 |
| 6434703 | Event initiation bus and associated fault protection for a telecommunications device | Brent K. Parrish, John J. Fernald | 2002-08-13 |
| 6425009 | Monitoring redundant control buses to provide a high availability local area network for a telecommunications device | Brent K. Parrish, John J. Fernald | 2002-07-23 |
| 4570258 | Exchange switch | — | 1986-02-11 |