ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,089, issued on Feb. 3, was assigned to Ocean University of China (Qingdao, China), Shandong Academy of Environmental Sciences and Environmental Engineering Co. Ltd. (Jinan, China) and Shandong Academy of Environmental Sciences Co. Ltd. (Jinan, China).

"System and method for controling amount of liquid carbon source released to constructed wetland" was invented by Moxi Xue (Jinan, China), Junjie Yang (Jinan, China), Jinyong Zhang (Jinan, China), Ganglin Lyu (Jinan, China), Jingjing Shang (Jinan, China), Song Zhao (Jinan, China), Boya Pan (Jinan, China), Wenquan Li (Jinan, China), Tianyu Mou (Jinan, China), Guangzhou Yu (Jinan, China), Ran Che (Jinan, China), Xingsheng Kang (Jinan, C...