Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828806 | Process for cleaning an exhaust gas | Claus Flockenhaus, Karl H. Laue, Theo Sander, Erich Hackler, Blagoje Levkov +2 more | 1989-05-09 |
| 4806427 | Process for the production of catalysts for the reduction of nitrogen oxides from exhaust gases and similar chemical air cleaning processes | Hartmut Kainer, Daniel Grimm | 1989-02-21 |