Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6360710 | Rocket piston internal combustion engine | Howard W. Christenson | 2002-03-26 |
| 6035814 | Compound combustion expansion internal combustion engine | Howard W. Christenson | 2000-03-14 |