Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6095570 | Plug-in coupling for pressure application systems | Harald Hagen, Manfred Berg, Hilmar Hester | 2000-08-01 |
| 6073976 | Screwed pipe joint with cutting ring for metal tubes | Harald Schmidt, Hilmar Hester | 2000-06-13 |