Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9381554 | Method for producing seamless hot-rolled pipes in continuous pipe rolling mills | Rolf Kümmerling, Christoph Prasser, Frank Hagemann, Gabriel Pereira, Winfried Braun | 2016-07-05 |
| 5019180 | Method of manufacturing of high-strength seamless steel tubes | Ingo von Hagen, Christoph Prasser | 1991-05-28 |