Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4684349 | Audio-visual teaching system and method | Kenneth Herrity | 1987-08-04 |
| 4482328 | Audio-visual teaching machine and control system therefor | John F. Shell, Steven D. Hale | 1984-11-13 |