Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9903203 | Ventilated mine roof support | — | 2018-02-27 |
| 9611738 | Ventilated mine roof support | — | 2017-04-04 |
| 9347316 | Telescopic mine roof support | Charles C. Lash | 2016-05-24 |
| 8851805 | Telescopic mine roof support | Charles C. Lash | 2014-10-07 |