Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831169 | Organopolysiloxane oils | Wolfgang Grape, Ottfried Schlak | 1989-05-16 |
| 4810305 | Hydrophobic pigments and fillers for incorporation in synthetic resins | Peter Panek, Horst Bornefeld, Dieter Rade, Wolfgang Ritter | 1989-03-07 |