ALEXANDRIA, Va., June 16 -- United States Patent no. 12,307,219, issued on May 20, was assigned to Lightmatter Inc. (Boston).

"Residue number system in a photonic matrix accelerator" was invented by Eric Hein (Atlanta), Ayon Basumalik (Framingham, Mass.), Nicholas C. Harris (Menlo Park, Calif.), Darius Bunandar (Boston) and Cansu Demirkiran (Brookline, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A photonic processor uses light signals and a residue number system (RNS) to perform calculations. The processor sums two or more values by shifting the phase of a light signal with phase shifters and reading out the summed phase with a coherent detector. Because phase winds back every 2Pi radians, the photo...