ALEXANDRIA, Va., June 9 -- United States Patent no. 12,289,157, issued on April 29, was assigned to ZHEJIANG LAB (Hangzhou, China).

"Two-phase access authentication method integrating spatial-temporal features in space-air-ground integrated networks" was invented by Bin Yang (Hangzhou, China), Shanyun Liu (Hangzhou, China), Xiangming Zhu (Hangzhou, China), Yinan Qi (Hangzhou, China), Xingming Zhang (Hangzhou, China), Yongdong Zhu (Hangzhou, China), Tao Xu (Hangzhou, China), Peijun Chen (Hangzhou, China) and Kainan Zhu (Hangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a two-phase access authentication method integrating spatial-temporal features in space-air-ground integrated networ...