US Patent Issued to ISHIKAWA ENERGY RESEARCH on Aug. 5 for "Flight device with first main rotor and second main rotor arranged below sub-rotor" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,377,970, issued on Aug. 5, was assigned to ISHIKAWA ENERGY RESEARCH Co. LTD. (Ota, Japan).

"Flight device with first main rotor and second main rotor arranged below sub-rotor" was invented by Mitsuru Ishikawa (Ota, Japan) and Takahito Sekita (Ota, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A flight device that can accurately perform attitude control with a sub-rotor is provided. The flight device 10 includes an airframe 19, an engine 30, motors 21, main rotors 14, and sub-rotors 15. The engine 30 rotates the main rotors 14. The motors 21 rotate the sub-rotors 15. The main rotors 14 are arranged below the sub-rotors 15. In the flight device 10, ...