Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12163592 | Oil control ring | Markus Kellner, Eugen Haaf, Dirk Baerenreuter | 2024-12-10 |
| 11719340 | Three-part oil scraper ring | Florian Böhnke, Richard Mittler, Dirk Barenreuter | 2023-08-08 |