Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9067249 | Tapered-roll stand for making seamless pipe | Walter Hoeffgen, Manfred Leferink | 2015-06-30 |
| 6089066 | Process for the production of seamless tubes | Ettore Cernuschi, Gerhard Kulessa, Jurgen Pietsch, Walter Randerath, Frank Salomon | 2000-07-18 |