Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11885246 | Engine valve with raised ring or dimple | Jeffrey Clark Krieger, Michael D. Roley | 2024-01-30 |
| 11215092 | Engine valve with raised ring or dimple | Jeffrey Clark Krieger, Michael D. Roley | 2022-01-04 |