ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,721,924, issued on Sept. 1, was assigned to R-Zero Systems Inc. (San Francisco).

"Directional ultraviolet disinfection apparatus" was invented by Jeremy Kuempel (San Francisco), Thomas Carlson (Salt Lake City), Sivan Sud (Greenwich, Conn.), Wiley Wang (Salt Lake City), Neil Day (Portola Valley, Calif.), Ashley Lynn Miller (Santa Barbara, Calif.) and John Cody Semones (Cottonwood Heights, Utah).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for disinfecting an air space is presented. The apparatus includes a housing having a front surface, a back surface, a top surface, a bottom surface, a first end, and a second end. A light emitting diode i...