Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6754927 | Device for detaching filter cakes | Wilhelm Claessen, Karl Grafen | 2004-06-29 |
| 4830233 | Sluice type apparatus for discharging material batches | Hubert Thelen | 1989-05-16 |