Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863694 | Chemically sensitive component | Heinrich Kimmel, Walter Gumbrecht | 1989-09-05 |
| 4841974 | Apparatus and method for the examination of a liquid medium | Walter Gumbrecht, Wolfgang Schelter, Peter Hobel | 1989-06-27 |