Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8197561 | Process for drying coal | Donald D. Dunlop, Clinton B. Camper, Vijay Sethi | 2012-06-12 |
| 7537622 | Process for drying coal | Donald D. Dunlop | 2009-05-26 |
| 6162265 | Process for processing coal | Donald D. Dunlop | 2000-12-19 |
| 5904741 | Process for processing coal | Donald D. Dunlop | 1999-05-18 |