Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4776285 | Process for gasifying fuels with oxygen or oxygen-containing gases to be carried out in a shaft-like furnace arrangement | Felix Wallner, Paul Freimann | 1988-10-11 |
| 4651656 | Method for processing a heavy-metal-containing residue from the chemical industry | Felix Wallner, Walter Lugscheider, Gotthard Uckert, Paul Freimann | 1987-03-24 |