Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840736 | Process for producing combustible sewage sludge filter cakes in filter presses | Bruno Sander, Manfred Neuwirth | 1989-06-20 |
HL
Herbert Lauer
Overall (1989): #106,595 of 140,708Top 80%
1
Patents 1989