Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4669261 | Exhaust gas treatment device for internal combustion engines | Siegfried Worner | 1987-06-02 |
| 4576799 | Filtering and post-combustion device for waste gases | Siegfried Worner, Herbert Klein | 1986-03-18 |