Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4525484 | Particulate polystyrene containing blowing agent and having improved expandability | Klaus Hahn, Isidoor De Grave, Rupert Schick, Adolf Echte | 1985-06-25 |
| 4520135 | Particulate polystyrene containing blowing agent and having improved expandability | Klaus Hahn, Isidoor De Grave, Rupert Schick, Adolf Echte | 1985-05-28 |
| 4513105 | Particulate polystyrene containing blowing agent and having improved expandability | Klaus Hahn, Isidoor De Grave, Rupert Schick, Adolf Echte | 1985-04-23 |