Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5673555 | Method for checking the efficiency of a catalytic converter | — | 1997-10-07 |
| 5634330 | Process for checking a burner system for heating a catalytic converter | Achim Koch | 1997-06-03 |
| 5617720 | Method for controlling the fuel supply for an internal combustion engine with a heatable catalytic converter | Achim Koch | 1997-04-08 |