Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876067 | Multilayer test strip device with a dissolvable reagent layer | Ulfert Deneke, Rolf Nagel, Helmut Freitag | 1989-10-24 |
| 4839297 | Test carrier and method for the analytical determination of a component of a body fluid | Helmut Freitag, Joachim Steinbiss | 1989-06-13 |
| 4820489 | Test strips and a process for the production thereof | Wolfgang-Reinhold Knappe, Heinz-Friedrich Trasch | 1989-04-11 |