ALEXANDRIA, Va., April 21 -- United States Patent no. 12,610,174, issued on April 21, was assigned to CHENG UEI PRECISION INDUSTRY Co. LTD. (New Taipei City, Taiwan).
"Headphone" was invented by Chin-Chung Lin (New Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A headphones comprising: a shell having a sidewall, an inner sidewall surface and an open hole, an outer wall connected to the sidewall and having an inner wall surface, two first retaining walls arranged on the inner wall surface to align with the open hole; a light guiding unit arranged in the open hole and comprising: a guiding unit body passing through the open hole, a guide tab extended from the guiding unit body, a guiding unit ba...