Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8608094 | Tube mill with internal lining of epoxy material | Hubert Grothaus | 2013-12-17 |
| 7168645 | Lift wall for a tube mill | Hubert Grothaus, Ludger Schulte | 2007-01-30 |
| 5522557 | Roll mill | Peter Tiggesbaumker, Helmut Lucke, Reinhold Giesemann, Johann Knecht | 1996-06-04 |