ALEXANDRIA, Va., May 5 -- United States Patent no. 12,621,819, issued on May 5, was assigned to The Board of Trustees of the Leland Stanford Junior University (Stanford, Calif.).

"Backscattering ambient ISM band signals" was invented by Pengyu Zhang (Palo Alto, Calif.), Dinesh Bharadia (Menlo Park, Calif.) and Sachin Katti (Stanford, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A backscatter tag device includes, in part, a receiver configured to receive a packet conforming to a communication protocol defining a multitude of codewords, a codeword translator configured to translate at least a first subset of the multitude of codewords disposed in the packet to a second multitude of codewords defined b...