ALEXANDRIA, Va., June 9 -- United States Patent no. 12,290,011, issued on April 29, was assigned to Toshiba Global Commerce Solutions Inc. (Durham, N.C.).

"Multi-bit storage device using phase change material" was invented by Timothy Crockett (Raleigh, N.C.) and Lester Bartus Jr. (Wake Forest, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A non-volatile multi-bit storage device that includes a phase change material doped with n-type or p-type semiconductor impurities, a first set of electrodes ohmically coupled to the phase change material, a second set of electrodes configured to apply an electric field across the phase change material. To program the non-volatile multi-bit storage device, an electric...