ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,462,669, issued on Nov. 4, was assigned to PixArt Imaging Inc. (Hsin-Chu County, Taiwan).
"Firm alarm device having two processors" was invented by Ching-Kun Chen (Hsin-Chu County, Taiwan) and Guo-Zhen Wang (Hsin-Chu County, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a fire alarm device including multiple light sources, a light sensor, a first processor and a second processor. In a standby mode, the first processor identifies whether to wake up the second processor according to a detection result of the light sensor obtained by detecting emission light of one of the multiple light sources. The second processor identifies whet...