ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,739,959, issued on Sept. 15, was assigned to SHENZHEN BILLDA TECHNOLOGY Co. LTD (Shenzhen, China).

"Light tube circuit for switching between emergency lighting and general lighting" was invented by Jianjun Ke (Shenzhen, China), Xiaobing Liu (Shenzhen, China), Peizhi Chen (Shenzhen, China) and Qiu Feng (Shenzhen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a light tube circuit for switching between emergency lighting and general lighting, comprising a main control module, wherein one terminal of the main control module is connected to a mains supply and a battery, and the other terminal of the main control module is connected to a ...