Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6140941 | Open road cashless toll collection system and method using transponders and cameras to track vehicles | Douglas Dwyer, Jeanne M. Perales-Herdt, Gary S. Gallagher, Roger J. O'Connor, Thomas L. McDaniel +1 more | 2000-10-31 |
| 5864306 | Detection regions for transponder tracking | Douglas Dwyer, Robert H. Kramp, II, Patrick P. Lim | 1999-01-26 |
| 5708425 | Real time messaging interface for vehicle detection sensors | Douglas Dwyer | 1998-01-13 |