Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4514594 | Power line carrier telephone extension system for full duplex conferencing between telephones and having telephone call hold capability | James R. Lindquist | 1985-04-30 |
| 4495386 | Telephone extension system utilizing power line carrier signals | Robert T. Dunn | 1985-01-22 |
| 4479033 | Telephone extension system utilizing power line carrier signals | Robert T. Dunn | 1984-10-23 |
| 4475193 | Power line carrier multi telephone extension system for full duplex conferencing between telephones | — | 1984-10-02 |
| 4401255 | Distributor pack carton | Betty A. Conroy, Patrick S. Maio | 1983-08-30 |
| 4308985 | Tray container with reinforced sidewalls | Guelfo A. Manizza | 1982-01-05 |