Issued Patents 2021
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |