Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4564726 | Pulse/direct current transmitting circuit in a key telephone system | — | 1986-01-14 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4564726 | Pulse/direct current transmitting circuit in a key telephone system | — | 1986-01-14 |