Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6287519 | Hand-held vehicle exhaust analyzer | Jonathan D. Nordman, John D. Neal, Troy Liebl, Peter D. Johnson | 2001-09-11 |
| 5993743 | Hand-held vehicle exhaust analyzer | Jonathan D. Nordman, John D. Neal, Troy Liebl, Peter D. Johnson | 1999-11-30 |