ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,505,731, issued on Dec. 23, was assigned to BENGBU EI FIRE ELECTRONICS Co. LTD. (Bengbu, China).

"Method and a system for improving alarm reliability of smoke fire detector" was invented by Hongying Zhang (Bengbu, China), Zhenfei Han (Bengbu, China), Jianjun Wang (Bengbu, China), Guangbiao Zhang (Bengbu, China), Chao Jin (Bengbu, China), Hongchi Ma (Bengbu, China) and Shuai Hao (Bengbu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention discloses a method and a system for improving the alarm reliability of a smoke fire detector. The method comprises the following steps: S1, Set an updated background threshold, an alarm threshold ...