ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,759, issued on Jan. 13, was assigned to Wisk Aero LLC (Mountain View, Calif.).

"Reflector installations for radar-based navigation" was invented by Adam Berger (Mountain View, Calif.), Andy Smith (Mountain View, Calif.), Sumant Sharma (Mountain View, Calif.) and Geoffrey Alan Long (Montara, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments provide a landing and approach navigation system. The navigation system can use a radar system onboard an aircraft to transmit radio energy. A rotating reflector at a landing area can reflect the radio energy back to the radar system with an amplitude-modulation that is due to the rotation. With sy...