Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4414621 | Interactive visual communications system | C. Douglas O'Brien | 1983-11-08 |
| 4247767 | Touch sensitive computer input device | C. Douglas O'Brien, Thomas E. Green | 1981-01-27 |