ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,284, issued on Feb. 10, was assigned to JIANGSU GOLDWIND SCIENCE & TECHNOLOGY Co. LTD. (Jiangsu, China).

"Blade noise reduction device, blade, and wind turbine generator set" was invented by Xiong Zhao (Jiangsu, China), Shaohong Jia (Jiangsu, China), Qiuge Liu (Jiangsu, China) and Zhuang Hao (Jiangsu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A blade noise reduction device, comprising a plurality of sawtooth units. The plurality of sawtooth units are arranged in a first direction. Each sawtooth unit comprises secondary teeth and a primary tooth, which extend in a second direction, wherein at least one secondary tooth is distributed on eac...