Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846830 | Cardiac valve prosthesis | Martin Knoch, Gunter Rau | 1989-07-11 |
| 4831065 | Antithrombogenic, non-calcifying material and method of making articles for medical purposes | Hanns Pietsch, Holger Kartheus, Hans-Joachim Holtzmann, Gunther Sachau | 1989-05-16 |
| 4799930 | Cardiac valve prosthesis | Martin Knoch, Gunter Rau | 1989-01-24 |