ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,704,084, issued on Aug. 11, was assigned to AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION (Suwon-si, South Korea) and THE CENTER FOR ADVANCED META-MATERIALS (Daejeon, South Korea).

"Acoustic metamaterial-based muffler for exhaust noise reduction" was invented by Jin Woo Lee (Suwon-si, South Korea) and Gyeong Ju Lee (Suwon-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides an acoustic metamaterial-based muffler for exhaust noise reduction, including an exhaust flow body that is provided with an inlet through which exhaust gas of an internal combustion engine flows in on one side, and an outlet throug...