Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6786335 | Pyrolysis plant for refuse and method for screening solid residues | Georg Gropper, Reinhold Riggenmann, Helmut Werdinig | 2004-09-07 |
| 6622869 | Separating device for solids and method for separating solids | Reinhold Riggenmann, Helmut Werdinig | 2003-09-23 |