ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,550,909, issued on Feb. 17, was assigned to HEFEI MIDEA REFRIGERATOR Co. LTD. (Hefei, China), HEFEI HUALING Co. LTD. (Hefei, China) and MIDEA GROUP Co. LTD. (Foshan, China).
"Storage apparatus" was invented by Zhijie Ren (Hefei, China) and Min Fang (Hefei, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A storage apparatus, comprising a compartment; and a box assembly, which is arranged in the compartment. The box assembly comprises: a first side wall; a second side wall arranged opposite the first side wall; a first conductive layer arranged on the second side wall; a first electret membrane, which is arranged on the first side wall, located betwe...