Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5807517 | Preheating for an extruder | Siegfried Wissmann, David E. Murdock | 1998-09-15 |
| 5750158 | Preheating apparatus for an extruder | Siegfried Wissmann, David E. Murdock | 1998-05-12 |
| 5076777 | Apparatus for coextruding plastics materials | — | 1991-12-31 |