ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,893, issued on March 31, was assigned to Potter Electric Signal Co. LLC (Hazelwood, Mo.).
"Forward and back scattering smoke detector and method of use" was invented by Wilson Cheung (Long Grove, Ill.), Zhong Hua Wang (Xi'an, China), Ming Jie Chen (Xi'an, China) and Fu Sheng Zhang (Xi'an, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods for smoke detection which utilizes two generally identical light sources and single light detector to compare the ratio of forward and backward scattering smoke particles present in a detection area."
The patent was filed on March 1, 2021, under Application No. 17/188,753.
*For further info...