ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,274, issued on May 5, was assigned to HEFE! MIDEA REFRIGERATOR Co. LTD. (Hefei, China), HEFEI HUALING Co. LTD. (Hefei, China) and MIDEA GROUP Co. LTD. (Foshan, China).
"Hinge assembly and opening and closing device" was invented by Benlei Liang (Hefei, China) and Chao Liu (Hefei, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to the field of household appliance technologies and discloses a hinge assembly and an opening and closing device. The hinge assembly includes a first matching member and a second matching member rotatably connected. The first matching member has a first curved surface and a second curved sur...