Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8957771 | Apparatus, system, and method for implementing and monitoring breath alcohol testing programs, usually from a fixed point location, such as a home | David L. Arringdale, Douglas Edward DeVries | 2015-02-17 |
| 7934577 | Ignition interlock breathalyzer | Douglas Edward DeVries | 2011-05-03 |
| 5612710 | Real time low cost, large scale array 65K color display using lamps | Thomas C. Christensen, Jack L. Carter, Douglas Edward DeVries, Alan Stimson Foster, Jacques Y. Foster +3 more | 1997-03-18 |
| 5426415 | Breath analyzer for use in automobile ignition locking systems | Timothy J. Prachar, Douglas Edward DeVries, Howard V. Block | 1995-06-20 |