ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,985, issued on Sept. 30, was assigned to ISHIKAWA ENERGY RESEARCH Co. LTD. (Gunma, Japan).
"Engine-mounted autonomous flying device" was invented by Mitsuru Ishikawa (Ota, Japan) and Hidetaka Kayanuma (Ota, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An autonomous flying device achieving a large payload and a long continuous flight time and also accurately adjust position and orientation while flying. The device includes: a main rotor and the like that provide main thrust; a sub rotor and the like that controls the orientation; an engine that generates energy for rotating the main rotor and the like and the sub rotor and the like; and an a...