Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4701896 | Interactive plural head laser disc system | Parley E. Hansen, George A. Walsh, Walter Richard Maguire | 1987-10-20 |
| 4644515 | Interactive multi-user laser disc system | Parley E. Hansen, George A. Walsh, Walter Richard Maguire | 1987-02-17 |