Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11598299 | Fuel filter | Philip J. DeVries, Randall C. Harkema | 2023-03-07 |
| 9816493 | Fuel injection pump | Philip J. DeVries, Gregg R. Spoolstra, Randall C. Harkema | 2017-11-14 |
| 6758416 | Fuel injector having an expansion tank accumulator | Thomas Earhart | 2004-07-06 |