ALEXANDRIA, Va., June 17 -- United States Patent no. 12,316,222, issued on May 27, was assigned to KOREAN AEROSPACE RESEARCH INSTITUTE (Daejeon, South Korea).

"DC-DC conversion device having coupling inductor" was invented by Jung Un Park (Daejeon, South Korea), Ja-Chun Koo (Daejeon, South Korea), Sang-Kyoo Han (Daejeon, South Korea), Ji Hun Bae (Seoul, South Korea), Nayoung Lee (Daejeon, South Korea) and Jae Dong Choi (Sejong-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "According to the present invention, an output inductor, rather than being composed of a separate inductor element, is magnetically coupled to a third inductor and a fourth inductor constituting a second transformer. Thus, c...