Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6641785 | Catalytic converter and method for cleaning exhaust gas | Frank Witzel | 2003-11-04 |
| 6596661 | Process for regenerating a deactivated catalyst | — | 2003-07-22 |
| 6576585 | Process for producing a catalyst body | Stefan Fischer, Gunther Pajonk, Frank Witzel | 2003-06-10 |