Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837373 | Test strips | Werner Gunkel | 1989-06-06 |
| 4805675 | Valves for chemical containers | Frank Joseph, Peter Muller, Klaus Kreher | 1989-02-21 |
HK
Helmuth Krauss
Overall (1989): #26,259 of 140,708Top 20%
2
Patents 1989