Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8359901 | Chemical impairment detection system and method of use to reduce circumvention | Richard C. Freund, Jason Niklas, Mitchell K. Neeld, Sherman Couch | 2013-01-29 |
| 6748792 | Impairment detection and interlock system with tester identification | Richard C. Freund, Sherman Couch | 2004-06-15 |