Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5003317 | Stolen vehicle recovery system | Donald R. Gray | 1991-03-26 |
| 4791572 | Method for accurately displaying positional information on a map | Lawrence R. Green, John A. Carrott, Donald R. Gray | 1988-12-13 |
| 4651157 | Security monitoring and tracking system | Donald R. Gray, Lawrence R. Green, John A. Carrott | 1987-03-17 |