Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11583641 | Gas recirculation system and method | Robert R. Mantell, Donald Millar, Eric Andersen | 2023-02-21 |
| 10493220 | Gas recirculation system and method | Robert R. Mantell, Donald Millar, Eric Andersen | 2019-12-03 |