Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6539175 | Highway crash barrier monitoring system | David A. Smith | 2003-03-25 |
| 5748108 | Method and apparatus for analyzing traffic and a sensor therefor | Harry R. Sampey, James H. Schimpf | 1998-05-05 |
| 5408179 | Method and apparatus for analying traffic and a sensor therefor | Harry R. Sampey, James H. Schimpf | 1995-04-18 |