Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11959552 | Piston ring system for an internal combustion engine with direct water injection | Richard Mittler | 2024-04-16 |
| 11578799 | Piston ring and piston ring/piston combination with improved wear properties | Nigel Gray, Oliver Nickisch | 2023-02-14 |
| 11493129 | Piston ring and piston with internal groove sealing | Richard Mittler | 2022-11-08 |
| 11187322 | Piston ring having a stepped running surface | Jurgen Gillen, Jörn Pröpper | 2021-11-30 |
| 11092238 | Multiple-piece oil stripping piston ring with reduced friction | Stephan Machliner | 2021-08-17 |
| 10969013 | Compression oil control piston ring | Richard Mittler | 2021-04-06 |
| 10969014 | One-piece oil control ring | Richard Mittler | 2021-04-06 |
| 10883600 | Two part oil control ring having oil pressure effect ridges | Richard Mittler | 2021-01-05 |
| 10871228 | Two-part oil control ring having axial stabilization and twist compensation | Dirk Barenreuter | 2020-12-22 |