Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821312 | Voice/data switch | Stephen Horton | 1989-04-11 |
| 4754476 | Premises page/intercom system utilizing telephone set component | Harry R. Rasmussen, Charles Nickerson | 1988-06-28 |
| 4653094 | Telephone set line status display | Harry R. Rasmussen, John D. Hoskinson, Charles Nickerson | 1987-03-24 |