ALEXANDRIA, Va., July 21 -- United States Patent no. 12,688,784, issued on July 21.
"Real time alert for landing airplanes" was invented by Mark Krietzman (Palos Verdes Estates, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dynamic ground distance training system and method of training for pilots including one or more emitters facing downward direct signal of focused energy (or sound and/or light) towards the runway and said focused energy signal is reflected from the runway; the reflected signal is received by one or more receivers positioned generally downward; and, the energy signal is processed via microprocessor(s) and a distance based on the time intervals when sampling signal reflections is ...