ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,487, issued on July 21, was assigned to Hainan Institute of Zhejiang University (Sanya City, China) and Zhejiang University (Hangzhou City, China).

"Method and system for automatically detecting nitrogen content, electronic device and medium" was invented by Yong He (Sanya City, China), Xuping Feng (Hangzhou City, China), Zhenyu Huang (Hangzhou City, China), Ningyuan Yang (Hangzhou City, China), Pengcheng Nie (Sanya City, China), Haiyan Cen (Sanya City, China), Shuiguang Deng (Sanya City, China), Chongde Sun (Sanya City, China) and Cui Sun (Sanya City, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method and a system for automatically detec...