Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4913097 | Steam generator that burns brown coal with cinders that vary in composition | Rudi Derksen, Karl-Heinz Maintok, Heinz Langner | 1990-04-03 |
| 4552097 | Steam generator with a stationary fluidized-bed hearth | — | 1985-11-12 |