Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4580698 | Automatically adjustable continuous feeder system | David L. Finke, Mark T. Curtis | 1986-04-08 |
| 4572086 | Fine fuel delivery system with remote drying and on site storage | Carroll H. Ladt | 1986-02-25 |
| 4444129 | Method of drying fine coal particles | — | 1984-04-24 |