Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5870980 | Stepped piston internal combustion engine | Peter R Hooper | 1999-02-16 |
| 5189995 | Stepped piston engine | — | 1993-03-02 |
| 4781153 | Internal combustion engine | — | 1988-11-01 |
| 4630591 | Stratified charge internal combustion engines | — | 1986-12-23 |
| 4522163 | Stepped piston and stepped piston engine | — | 1985-06-11 |
| 4210108 | Stepped piston two-stroke engines | — | 1980-07-01 |