Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871375 | Fuels for Otto engines | Franz-Dieter Martischius, Knut Oppenlaender | 1989-10-03 |
| 4844714 | Fuels containing small amounts of alkoxylates and polycarboximides | Hans Peter Rath, Knut Oppenlaender, Charalampos Gousetis | 1989-07-04 |