Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4986099 | Lock system and lock having two electronic control systems | Michael F. Johnson, David Cooper | 1991-01-22 |
| 4642685 | Storing data relating to television viewing | Robert L. Shrier, Raymond Laxton | 1987-02-10 |
| 4629090 | Hotel room bar with optical sensing system | Frank I. Harris | 1986-12-16 |
| 4578700 | Apparatus for storing data relating to television viewing | Robert L. Shrier, Raymond Laxton | 1986-03-25 |