Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5225390 | Catalyst for reducing nitrogen oxides | Norbert Landgraf, Josef Sprehe, Wolfgang Gajewski, Dietmar Hein, Helmut Schmelz | 1993-07-06 |
| 5045516 | Process for producing a catalyst for reducing nitrogen oxides in flue gases | Norbert Landgraf, Josef Sprehe, Wolfgang Gajewski, Dietmar Hein, Helmut Schmelz | 1991-09-03 |