Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5653102 | Air/fuel control system with catalytic converter monitoring for a variable displacement engine | Glenn A. Zimlich, David Karl Bidner | 1997-08-05 |
| 5617829 | Method for maintaining clean spark plugs in a variable displacement engine | David Karl Bidner, Glenn A. Zimlich | 1997-04-08 |