ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,512, issued on April 14, was assigned to Linyi University (Linyi, China).

"Humidifying device and humidifying method for air-conditioning unit" was invented by Ruquan Liang (Linyi, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A humidifying device and a humidifying method for an air-conditioning unit includes a connecting piece, where the connecting piece includes a connecting coiled pipe fixedly connected to an inner wall of a top end of a humidifying cavity, an air inlet end of the connecting coiled pipe extends out of the humidifying cavity to be selectively communicated with an air-conditioner indoor unit or air-conditioner outdoor unit,...