Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880169 | Process and device for micronizing solid matter in jet mills | Hans-Gunter Zander, Bernd Holle | 1989-11-14 |
| 4810305 | Hydrophobic pigments and fillers for incorporation in synthetic resins | Rolf Braun, Peter Panek, Dieter Rade, Wolfgang Ritter | 1989-03-07 |