Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11866161 | Helicopter with coaxial counter-rotating roller driven rotors | — | 2024-01-09 |
| 11292588 | Helicopter with coaxial counter-rotating annular electric motor rotors | — | 2022-04-05 |
| 8991743 | Helicopter with blade-tip thrusters and annular centrifugal fuel supply tank and concentric cabin and fuselage | Ralph Elliott | 2015-03-31 |