Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837043 | Process for the production of test strips by casting method | Helmut Engelmann, Gunter Junkers | 1989-06-06 |
| 4824639 | Test device and a method for the detection of a component of a liquid sample | Hans-Hagen von Dohren, Hermann Perrey, Georg Frank, Rolf Dhein | 1989-04-25 |
| 4824640 | Transparent test strip system | Hans-Hagen von Dohren, Hermann Perrey, Klaus Wehling | 1989-04-25 |
| 4804475 | Metallized membrane systems | Kirkor Sirinyan, Ulrich von Gizycki, Rudolf Merten, Hermann Perrey, Gerhard D. Wolf | 1989-02-14 |