ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,504,531, issued on Dec. 23, was assigned to BlueHalo LLC (Huntsville, Ala.).

"System and method for dynamic two-way ranging using unmanned aerial vehicles" was invented by Alexis Henry Clark (Owens Crossroads, Ala.), Levi Judah Smolin (Brownsboro, Ala.) and Ilya Semenov (Gaithersburg, Md.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system and method for dynamic two-way ranging using unmanned aerial vehicles may use ultrawideband transceivers for dynamic two-way ranging between unmanned aerial vehicles among a first set of unmanned aerial vehicles. Embodiments of the system and method may allow for dynamic two-way ranging where GPS information may b...