Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9353675 | Two-stroke engine | Michael Grether, Stefan Kummermehr | 2016-05-31 |
| 8671897 | Two-stroke engine | Werner Geyer, Mark Reichler, Evelyn Kullik, Helmut Schlessmann | 2014-03-18 |
| 8667933 | Two-stroke engine | Michael Grether, Stefan Kummermehr | 2014-03-11 |