Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11154881 | Rotary nozzle | Samuel C. Walker, David Eugene Robertson | 2021-10-26 |
| 11000866 | Rotary nozzles and deflectors | David Eugene Robertson | 2021-05-11 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11154881 | Rotary nozzle | Samuel C. Walker, David Eugene Robertson | 2021-10-26 |
| 11000866 | Rotary nozzles and deflectors | David Eugene Robertson | 2021-05-11 |