Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830801 | Degassing process for a worm extruder | Erwin Rossberger, Josef Helmut Weinmaier | 1989-05-16 |
| 4722680 | Degassing device on a worm extruder | Erwin Rossberger, Josef Helmut Weinmaier | 1988-02-02 |