ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,201, issued on July 29.
"Multi-rotor aircraft" was invented by Pengyue Zhou (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A multi-rotor aircraft comprising a controller, an annular airframe, at least two first rotor units and at least two actuation components. Wherein, the annular airframe comprises at least two frames and at least two connecting units, adjacent frames are movably connected by at least one of the connecting units; the first rotor units are arranged on the annular airframe and are electrically connected with the controller, the first rotor units are used to provide lift for the multi-rotor aircraft to fly; the actu...