Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8973262 | Method for producing a piston ring | Hans-Gerd Kroeschel, Steffen Hoppe | 2015-03-10 |
| 8430410 | Piston ring | Frank Münchow | 2013-04-30 |
| 8356820 | Piston ring | Frank Münchow | 2013-01-22 |
| 8235393 | Piston ring | Hans-Rainer Brillert | 2012-08-07 |