Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5909777 | Method and apparatus for stopping the spread of a fire in an underground mine | — | 1999-06-08 |
| 5099976 | Fire extinguishing apparatus for compressors | — | 1992-03-31 |
| 4454922 | Drill rod and drilling apparatus | Harley G. Pyles | 1984-06-19 |
| 4387798 | Cascading conveyor system | David R. Hazen | 1983-06-14 |