ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,446, issued on Jan. 20, was assigned to Guangdong Sirui Optical Co. Ltd. (Zhongshan, China).
"Extendible support leg" was invented by Jie Li (Zhongshan, China) and Fan Xiao (Zhongshan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An extendable support leg includes an axially telescopic top leg tube, a middle leg tube and an end leg tube. A first clamping mechanism is between the top leg tube and the middle leg tube. A second clamping mechanism is between the middle leg tube and the end leg tube. A locking control mechanism includes a locking ring connected to an upper end of the top leg tube, and a drive shaft connected to the locking ring h...