Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4561843 | Transfer flue with means for improving the flow of gases | Ralf Schumacher, Ingomar Kohler, Gerd-Ullrich Leppert | 1985-12-31 |
| 4440599 | Heating system for a coke oven battery having twin-heating flues | Ralf Schumacher, Heinz Thubeauville | 1984-04-03 |
| 4435152 | Apparatus for improving the flow of gases to a combustion chamber of a coke oven or the like | Ralf Schumacher | 1984-03-06 |
| 4416732 | Horizontal coke oven battery | Paul Gernhardt, Heinz Thubeauville | 1983-11-22 |
| 4392824 | System for improving the flow of gases to a combustion chamber of a coke oven or the like | Ralf Schumacher | 1983-07-12 |
| 4348258 | Spray nozzle for coke oven gas-collecting system | Ralf Schumacher | 1982-09-07 |
| 4299356 | Spray nozzle for coke oven gas-collecting system | Ralf Schumacher | 1981-11-10 |