Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861265 | Apparatus and method for the heat treatment of fine-grained material | Manfred Durr, Georg Unland, Gunter Driemeier, Heinz-Herbert Schmits, Michael von Seebach +3 more | 1989-08-29 |
| 4808108 | Method and apparatus for the heat treatment of fine-grained material | Peter Tiggesbaumker, Manfred Durr, Jurgen Wurr, Wolfgang Rother, Karl Menzel +4 more | 1989-02-28 |