Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5228335 | Method and apparatus for detection of catalyst failure on-board a motor vehicle using a dual oxygen sensor and an algorithm | John W. Koupal, Michael A. Sabourin | 1993-07-20 |
| 5050378 | Exhaust recharging of a four cycle internal combustion engine | — | 1991-09-24 |