Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4274155 | Multiport conference circuit with multi-frame summing and voice level coding | Donald W. McLaughlin | 1981-06-16 |
| 4257120 | Multiport conference circuit with multi-frame summing | Donald W. McLaughlin | 1981-03-17 |
| 4254497 | Multiport conference circuit with voice level coding | Donald W. McLaughlin | 1981-03-03 |