Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9937540 | Piercing mandrel having an improved service life for producing seamless tubes | Christian Klempel, Rene Baadjou, Rolf Kümmerling | 2018-04-10 |
| 9381554 | Method for producing seamless hot-rolled pipes in continuous pipe rolling mills | Rolf Kümmerling, Christoph Prasser, Gerd Homberg, Frank Hagemann, Gabriel Pereira | 2016-07-05 |
| 9056341 | Method for producing seamless tubes by means of a three-roll bar rolling mill | Rolf Kümmerling, Manfred Bellmann, Hidenori Kinugasa, Sasaki Kenichi | 2015-06-16 |
| 6065320 | Caliber contour in a rolling mill roller for tubes | Peter Thieven | 2000-05-23 |