Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5983811 | Method and roller grill for burning refuse | Kai Keldenich, Jurgen Scheffler, Peter Grell, Othmar Frielingsdorf | 1999-11-16 |
| 5967064 | Roller grate | Kai Keldenich, Jurgen Scheffler, Peter Grell, Othmar Frielingsdorf | 1999-10-19 |