ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,328, issued on May 6, was assigned to JETOPTERA INC. (Edmonds, Wash.).

"Adaptive vertical take-off and landing propulsion system" was invented by Andrei Evulet (Edmonds, Wash.) and Tyler Smallwood (Edmonds, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A propulsion system for an aircraft includes a plenum having an intake port and an output port. A fan is coupled to a motor configured to power the fan, and the powered fan is configured to compress ambient air entering the intake port. One or more ejectors are fluidically coupled to the plenum via one or more valves. A nozzle is disposed within the output port and includes a set of vanes. The ...