ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,456,449, issued on Oct. 28, was assigned to NITTO DENKO Corp. (Osaka, Japan) and THE SCHOOL CORPORATION KANSAI UNIVERSITY (Osaka, Japan).

"Active noise control system" was invented by Kohei Oto (Osaka, Japan), Yusuke Komoto (Osaka, Japan), Ryohei Oban (Osaka, Japan), Saori Yamamoto (Osaka, Japan), Yoshinobu Kajikawa (Osaka, Japan) and Shun Hirose (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A speaker (10) includes a radiation surface (15). The radiation surface (15) has a first region (15a), a second region (15b), and a third region (15c) between the first region (15a) and the second region (15b). When an axis passing through the third r...