Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5263421 | Coal fly-ash railway hopper car with 70 degree minimum slope and end sheet angle and longitudinal dual purpose loading hatch | William Alan Mullen | 1993-11-23 |
| 5137753 | Pelletizing ash | Alan E. Bland, Richard K. Cox, Allen R. Rowen, Richard A. Schumann | 1992-08-11 |