Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6435218 | Pipe with crack stopper feature, and process of protecting a pipe against propagation of cracks | Hans-Georg Hillenbrand, Ingo von Hagen, Gerhard Knauf, Johannes Arndt | 2002-08-20 |
| 6161425 | Process and device for checking a hollow body section | Gerhard Knauf, Ronald Claus | 2000-12-19 |