Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805675 | Valves for chemical containers | Frank Joseph, Helmuth Krauss, Peter Muller | 1989-02-21 |
KK
Klaus Kreher
Overall (1989): #86,657 of 140,708Top 65%
1
Patents 1989