ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,548,440, issued on Feb. 10, was assigned to NEC Corp. (Tokyo).

"Distributed optical fiber sensing (DFOS) system and method of using the same" was invented by Hemant Shivsagar Prasad (Tokyo), Daisuke Ikefuji (Tokyo) and Tomoyuki Hino (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A vehicle tracking method includes receiving distributed optical fiber sensing (DFOS) data. The vehicle tracking method includes identifying hit points within the DFOS data, wherein each of the hit points corresponds to a location of a corresponding vehicle at a detection time. The vehicle tracking method includes clustering the identified hit points to define one or more...