Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6098590 | Cylinder head for internal combustion engines | Immanuel Kutschera, Ulrich Engel, Bernward Vethacke, Hartmut Engels, Claus Mumm | 2000-08-08 |
| 6053141 | Cylinder head for internal-combustion engines | Eckhart Nitzschke, Tilmann Roemheld, Willy Treyz | 2000-04-25 |