Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6648209 | Process for producing welded steel pipes with a high degree of strength, ductility and deformability | Gerhard Knauf | 2003-11-18 |
| 5794840 | Process for the production of pipes by the UOE process | Gerd Vogt | 1998-08-18 |