Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698098 | Oil filter housing including a valved drain opening | Volker Ernst, Arthur Klotz | 1997-12-16 |
| 5696318 | Air intake for an internal combustion engine | Volker Ernst | 1997-12-09 |