Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872888 | Microporous membrane filter and method of producing same | Wolfgang Ehrfeld, Jurgen Mohr, Dietrich Munchmeyer | 1989-10-10 |
| 4796501 | Apparatus for punching out a part from a workpiece | — | 1989-01-10 |