Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4535454 | Multifrequency tone distribution using a conferencing arrangement | Kent V. Mina | 1985-08-13 |
| 4389720 | Distributed digital conferencing system | Leslie A. Baxter, Paul Berkowitz | 1983-06-21 |
| 4281315 | Collection of messages from data terminals using different protocols and formats | Henry C. Bauer, Gary J. Burns, Travis H. Gordon, Heinz Kahlbrock, Robert F. Ricca +1 more | 1981-07-28 |