Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846130 | Engine ignition timing with knock control by combustion pressure harmonic amplitude ratio | — | 1989-07-11 |
| 4721089 | Adaptive dilution control for IC engine responsive to LPP | James H. Currie, Kenneth J. Cinpinski, Kenneth J. Buslepp, Douglas K. Mehaffey, Leroy E. Medendorp | 1988-01-26 |
| 4699105 | Engine ignition timing by combustion pressure harmonic phase difference | — | 1987-10-13 |
| 4699107 | Engine dilution control by combustion pressure harmonic amplitude ratio | — | 1987-10-13 |