ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,484,235, issued on Nov. 25, was assigned to International Business Machines Corp. (Armonk, N.Y.).

"Solid-state switch" was invented by Guy M. Cohen (Ossining, N.Y.), Takashi Ando (Eastchester, N.Y.) and Nanbo Gong (White Plains, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A solid-state switch structure including a first solid-state material having a programable electrical resistance comprising a high electrical resistance obtained following a first type programming pulse and a low electrical resistance obtained following a second type programming pulse, a second solid-state material having a programable electrical resistance comprising a high el...