Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4984098 | Point of purchase automatically-actuated audio advertising device and method | — | 1991-01-08 |
| 4644423 | Automatic program source selection method and apparatus | Christopher K. Reifsteck | 1987-02-17 |