Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859331 | System for exchanging a substance between fluids | Wolf-Dieter Schmidt | 1989-08-22 |
| 4801385 | System for exchanging a substance between fluids | Wolf-Dieter Schmidt | 1989-01-31 |