ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,987, issued on April 21, was assigned to Hyundai Motor Co. (Seoul, South Korea), Kia Corp. (Seoul, South Korea) and Doowon Climate Control Co. Ltd. (Asan-Si, South Korea).

"Heat pump system for vehicle" was invented by Jeawan Kim (Hwaseong-si, South Korea), Jae Yeon Kim (Hwaseong-si, South Korea), Man Hee Park (Suwon-si, South Korea) and Chul Min Kim (Asan-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "An embodiment heat pump system for a vehicle includes a compressor for compressing a refrigerant, a condenser connected to the compressor, a heat exchanger connected to the condenser, a first expansion valve connected to the heat exch...