Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5462615 | Weldable high-strength structural steel with 13% chromium | Ingo von Hagen, Rolf Popperling, Ulrike Zeislmair | 1995-10-31 |
| 5122198 | Method of improving the resistance of articles of steel to H-induced stress-corrosion cracking | Ingo von Hagen, Gerd Heinz, Rolf Popperling | 1992-06-16 |