Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4792967 | PBX DID and E and M tie trunk integration adapter and method | David Ladd | 1988-12-20 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4792967 | PBX DID and E and M tie trunk integration adapter and method | David Ladd | 1988-12-20 |