Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880172 | Roller mill | Heinz-Dieter Baldus, Norbert Schroder | 1989-11-14 |
| 4861265 | Apparatus and method for the heat treatment of fine-grained material | Manfred Durr, Georg Unland, Gunter Driemeier, Karl Krutzner, Heinz-Herbert Schmits +3 more | 1989-08-29 |
| 4838830 | Flexible coupling | — | 1989-06-13 |