Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7451852 | Vehicle sobriety interlock system with personal identification element | Jeffrey B. Stewart, Charles E. Smith | 2008-11-18 |
| 7204335 | Vehicle sobriety interlock device | Jeffrey B. Stewart, Charles E. Smith | 2007-04-17 |