Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11156139 | Method and device for purifying exhaust gas | Simone Müller-Hellwig, Roland Heigl, Arne Seifert, Hagen Seifert | 2021-10-26 |
| 10919769 | Utilization of pollutants from internal combustion engines | Simone Müller-Hellwig, Hagen Seifert, Roland Heigl, Arne Seifert | 2021-02-16 |