ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,401,429, issued on Aug. 26, was assigned to Massachusetts Institute of Technology (Cambridge, Mass.).

"Methods and apparatus for acoustic backscatter communication" was invented by Junsu Jang (Suwon, South Korea) and Fadel Adib (Cambridge, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A communication system may communicate by backscattered acoustic signals that propagate through a liquid or solid. In this system, one or more transmitters may transmit acoustic signals that travel to, and are reflected by, an acoustic backscatter node. The backscatter node may modulate the amplitude and/or phase of the reflected acoustic signals, by varying the aco...