Issued Patents 2019
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10378355 | Mine stopping panel and method of manufacture | John M. Kennedy | 2019-08-13 |
| 10316663 | Mine door | John M. Kennedy | 2019-06-11 |
| 10287884 | Mine stopping panel and method of sealing a mine stopping | John M. Kennedy | 2019-05-14 |
| 10184286 | Articulated mine door opening mechanism | John M. Kennedy | 2019-01-22 |