Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6009862 | Exhaust gas recirculation control system and method | Joseph Norman Ulrey, Jonathan Willey, Keith Z. Doorenbos | 2000-01-04 |
| 5515833 | Exhaust gas recirculation system with improved altitude compensation | Michael John Cullen, Joseph Norman Ulrey | 1996-05-14 |
| 5303168 | Engine operation to estimate and control exhaust catalytic converter temperature | Michael John Cullen, James Matthew Kindree | 1994-04-12 |
| 5190017 | Exhaust gas recirculation system fault detector | Michael John Cullen, Rogelio G. Samson, Alistair S. Teasdale | 1993-03-02 |