ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,963, issued on Feb. 3, was assigned to Archer Aviation Inc. (San Jose, Calif.).

"Method for controlling a transition of a vertical take-off and landing aircraft from hover flight to cruise flight and vice versa" was invented by Valentin Falkenberg (Wessling, Germany) and Tiago Lima (Wessling, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "During the transition of a vertical take-off and landing aircraft from hover flight to cruise flight and vice versa, a method for controlling this transition is configured to push propulsion units of the VTOL aircraft through an unstable flow condition zone within a predetermined time period. Each propulsion...