Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5794840 | Process for the production of pipes by the UOE process | Gerold Hohl | 1998-08-18 |
| 5260522 | Double-wall hollow body with interlayer and method for manufacturing same | Manfred Janssen, Ulrich Becker | 1993-11-09 |
| 4951492 | Hydraulic expansion of tubing | — | 1990-08-28 |