Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11629625 | Systems and methods of engine exhaust air injection before and after catalytic converters | Chengke Liu, Rafat F. Hattar, John Michael Ellenberger | 2023-04-18 |
| 9903334 | Low speed pre-ignition knock detection | William P Attard | 2018-02-27 |