Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11150229 | Method and apparatus for automatically maintaining a desired level of oxygen in a refuge | Kyle D. Maust, Kyle R. Murray, Rob Albinger | 2021-10-19 |
| 10890069 | Refuge shelter, coupler and method | Shawn L. Fike, Michael Scott Bishoff | 2021-01-12 |