Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5407266 | Mixing kneader with rotating shafts and kneading bars | Walther Schwenk, Alfred Kunz | 1995-04-18 |
| 5147135 | Continuously operating mixing kneader | Jorg List, Walther Schwenk, Pierre Liechti | 1992-09-15 |