Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11168600 | Method for operating an exhaust system of an internal combustion engine of a motor vehicle and exhaust system for an internal combustion engine of a motor vehicle | Berthold Keppeler | 2021-11-09 |
| 11053832 | Method for operating an exhaust system, in particular of a motor vehicle | Ortwin Balthes, Berthold Keppeler, Siegfried Mueller | 2021-07-06 |
| 11015504 | Method for operating an internal combustion engine of a motor vehicle, in particular a motor car | Ortwin Balthes, Berthold Keppeler, Juergen Kuckelsberg, Siegfried Mueller | 2021-05-25 |