Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797136 | Low rank coal by wet oxidizing, drying and cooling | Mark A. Siddoway, Neal D. Stidham | 1989-01-10 |
| 4582511 | Process for suppressing the dusting of coal | Mark A. Siddoway, Donald E. Hardesty, John King | 1986-04-15 |