Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |