Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4775865 | Emergency vehicle warning and traffic control system | Michael R. Smith, Paul J. Davidson | 1988-10-04 |
| 4704610 | Emergency vehicle warning and traffic control system | Michel R. Smith, James Davidson | 1987-11-03 |