Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11174018 | Anti-torque control using fixed blade pitch motors | Carlos Alexander Fenny, Erik John Oltheten | 2021-11-16 |
| 11077957 | Selectable barrier filtration system | David F. Haynes, David L. Miller, Bradley Robert Henson | 2021-08-03 |
| 10906663 | Apparatus for boundary layer air inlet utilization | Angel David Rosado, Robert Reynolds, David F. Haynes, William Mathisen Gons | 2021-02-02 |
| 10889384 | Rotorcraft engine inlet configuration to optimize performance in both hover and high speed flight | — | 2021-01-12 |