ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,478,700, issued on Nov. 25, was assigned to BOLB Inc. (Livermore, Calif.).

"Safe ultraviolet optical source and safe indoor air disinfection system" was invented by Jianping Zhang (Arcadia, Calif.), Ling Zhou (Dublin, Calif.), Ying Gao (Fremont, Calif.), Huazhong Deng (Maoming, China) and Maria Topete (Livermore, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An indoor disinfection system has a collection of lighting units. Each lighting unit includes a germicidal ultraviolet (GUV) light source emitting a GUV light cone with a cone angle less than 60 degrees. The GUV light cone contains optical power with wavelengths between 10-280 nm. A human pr...