Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5139754 | Catalytic/non-catalytic combination process for nitrogen oxides reduction | William H. Sun, John E. Hofmann | 1992-08-18 |
| 4978514 | Combined catalytic/non-catalytic process for nitrogen oxides reduction | John E. Hofmann, William H. Sun | 1990-12-18 |