Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9528071 | Lubricating oil compositions with enhanced piston cleanliness | Richard Hogendoorn | 2016-12-27 |
| 9528074 | Lubricating oil compositions with enhanced piston cleanliness | Richard Hogendoorn | 2016-12-27 |