Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7195480 | Shaft preheater | Uwe Schuh, Norbert Patzelt, Thomas Schmits, Heinz Tölke, Wolfgang Schwab | 2007-03-27 |
| 6918760 | Shaft pre-heater | Norbert Patzelt, Thomas R. Schmitz, Uwe Schuh, Wolfgang Schwab, Tölke Heinz | 2005-07-19 |