Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4374730 | Process and apparatus for the biological purification of sewage | Alexandru Braha, Hans Daucher, Klaus Hess, Peter Kroetzsch, Helmut Merkel +2 more | 1983-02-22 |
WS
Walter Schwaegerl
Overall (All Time): #4,048,996 of 4,157,543Top 100%
1
Patents All Time