ALEXANDRIA, Va., June 16 -- United States Patent no. 12,307,663, issued on May 20, was assigned to BEIJING ZHENHEALTH TECHNOLOGY Co. LTD. (Beijing).

"Method, device and apparatus for differentiating arteries and veins of retinal vessels" was invented by Liming Dai (Beijing), Hongyang Jiang (Beijing), Dongdong Zhang (Beijing) and Lei Yu (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method, device and apparatus for differentiating arteries and veins of retinal vessels are provided. The method includes acquiring a vessel extraction image, a fundus image, and optic disc center coordinate; extracting a main vessel according to the vessel extraction image, the fundus image and the optic disc center coo...