Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5765282 | Internal combustion engine cylinder head method of manufacture | Roger D. Sweetland | 1998-06-16 |
| 4552662 | Integral fuel filter head and adapter for multiple fuel filter canisters | Ervin E. Bush, Roger D. Sweetland | 1985-11-12 |