Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874590 | Catalytic reduction of nitrogen oxides | Mark T. Staniulis | 1989-10-17 |
| 4867954 | Catalytic reduction of nitrogen oxides | Mark T. Staniulis, James G. Vassilakis, Donald F. Best | 1989-09-19 |