Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6047566 | Method and device for melting recycled silicate starting materials | Markus Siegler | 2000-04-11 |
| 5709728 | Method and device for the production of mineral wool by using mineral wool waste as recycled starting material | Helmut Hornung | 1998-01-20 |