Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H1466 | Oxygen injection system | — | 1995-08-01 |
| 5373892 | Dry sump lubricated internal combustion engine with modular cooling system | John L. Johnson | 1994-12-20 |
RS
Roger A. Stapf
Overall (All Time): #2,288,555 of 4,157,543Top 60%
2
Patents All Time