Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5462234 | Grinding plant and method of grinding and classifying brittle material for grinding | Norbert Patzelt, Hubert Eickholt | 1995-10-31 |
| 4927086 | Grinding process and apparatus | Heinrich Henne, Karl-Heinz Dammertz, Lutz Schneider | 1990-05-22 |