ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,538,069, issued on Jan. 27, was assigned to Audio-Technica Corp. (Tokyo).
"Earphone" was invented by Koichi Irii (Tokyo) and Yusuke Sano (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An earphone includes a housing that is connected with a nozzle for emitting sound to the outside, a fixed pole that is fixed inside the housing, a diaphragm that is provided so as to divide a space inside the housing into two, and vibrates in accordance with a potential difference generated between the diaphragm and the fixed pole facing each other, a support part that supports the diaphragm such that a portion of the diaphragm is in contact with the fixed pole, and...