Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851202 | Process for the simultaneous removal of nitrogen oxides and sulfur dioxide from an oxygen-containing exhaust gas | — | 1989-07-25 |
| 4842835 | Process of purifying flue gases | Karl-Heinz Dorr, Hugo Grimm, Heinz Neumann, Norbert Ohlms | 1989-06-27 |