Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6435218 | Pipe with crack stopper feature, and process of protecting a pipe against propagation of cracks | Ingo von Hagen, Gerd Junker, Gerhard Knauf, Johannes Arndt | 2002-08-20 |
| 4905806 | Synchronizing shift clutch toothing arrangement | Gunter Worner | 1990-03-06 |
| 4631095 | Steel that is exposed to hydrogen sulfide | Ingo von Hagen, Rolf Popperling | 1986-12-23 |