Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5573790 | Apparatus for manufacturing expandable polystyrene (EPS) pellets | Erik W. Wehtje | 1996-11-12 |
| 5267845 | Apparatus for manufacturing expandable polystyrene (EPS) pellets | Erik W. Wehtje | 1993-12-07 |
| 4790967 | Method and apparatus for expanding loose fill material, such as expandable polystrene pellets | Jean-Pierre Guillemard | 1988-12-13 |