Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812296 | Process utilizing catalytic material for the reduction of nitrous oxides | Helmut Schmelz, Helmut Thomann, Eva-Helga Wilbert, Wolfgang Gajewski, Josef Sprehe +5 more | 1989-03-14 |