Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5797677 | Screw-type extruding machine having a screw element defining a groove with an expansion region at each end thereof | Gerhard Weihrich, Wolfgang Woerz, Rainer Sauter | 1998-08-25 |