Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6214383 | Precipitated silicas which contain an active substance | Heinz Esch, Robert Kuhlmann, Karin Otto, Ralf Rausch, Klaus Thomas | 2001-04-10 |
| 5158764 | Dentifrice | Ivan Again, Vera Boyanova, Karin Otto, Harald Dippmann | 1992-10-27 |
| 5124143 | Dentrifice | Hans R. Muhlemann, Karl-Hans Muller | 1992-06-23 |
| 4753791 | Dental-care composition using precipitated silica | Karl-Hans Muller, Gunther Turk | 1988-06-28 |
| 4705679 | Transparent dental care composition | Karl-Hans Muller, Gunther Turk | 1987-11-10 |
| 4704270 | Opaque dental-care composition | Karl-Hans Muller, Gunther Turk | 1987-11-03 |
| 4664907 | Dental-care composition | Karl-Hans Muller, Gunther Turk | 1987-05-12 |