Issued Patents 2016
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9447684 | Mine stopping panel with end caps and louver connections | William R. Kennedy | 2016-09-20 |
| 9447685 | Mine ventilation structure and a deck panel for such a structure | William R. Kennedy | 2016-09-20 |
| 9341061 | Method of opening a mine door leaf | William R. Kennedy | 2016-05-17 |