Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9789522 | Rolling mill and rolling method | Walter KIRCHNER, Norbert Theelen | 2017-10-17 |
| 9067249 | Tapered-roll stand for making seamless pipe | Thomas Leisten, Manfred Leferink | 2015-06-30 |
| 8904839 | Method of and rolling mill for making seamless steel pipe | Norbert Theelen | 2014-12-09 |