Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11203418 | Mount systems for pylon assemblies with coaxial rotors | Frank B. Stamps, Michael R. Smith | 2021-12-21 |
| 11173521 | Vibration attenuator | David E. Heverly, II, Frank B. Stamps, Gary Miller, Richard E. Rauber, Thomas C. Parham, Jr. +2 more | 2021-11-16 |
| 11148790 | Rotor hub vibration attenuator | Jouyoung Jason Choi, David E. Heverly, II, Michael R. Smith, Frank B. Stamps, Thomas C. Parham, Jr. +1 more | 2021-10-19 |
| 11084575 | Rotor hub vibration attenuator | Jouyoung Jason Choi, David E. Heverly, II, Michael R. Smith, Frank B. Stamps, Thomas C. Parham, Jr. +1 more | 2021-08-10 |