Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883647 | Use of manganese nodules or deep-sea ores containing manganese for the reduction of nitrogen oxides in exhaust gases | Hartmut Kainer, Daniel Grimm, Wilfried Schnelle | 1989-11-28 |