Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797191 | Measuring device for determination of the activity or of the concentration of ions in solutions | Klaus Metzner, Detlef Westphal, Wolfgang Allendorfer, Hans-Dietrich Polaschegg | 1989-01-10 |