Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4950391 | Capillary dialyzer | — | 1990-08-21 |
| 4253963 | Asymmetrical ultrafiltration membrane on the basis of cellulose triacetate | Walter Franken, Dieter Nussbaumer, Horst Perl | 1981-03-03 |
| 4204957 | Artificial kidney | — | 1980-05-27 |