ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,439,195, issued on Oct. 7, was assigned to Yamaha Corp. (Hamamatsu, Japan).
"Headphone" was invented by Chikara Kobayashi (Hamamatsu, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A headphone includes an outer arc-shaped headband including two strip-shaped guide portion respectively provided at both ends of the headband. The headphone further includes two speakers respectively connected to ends of the two guide portions. The headphone further includes an inner arc-shaped head pad including two sliders respectively provided at both ends of the head pad. Each slider includes an insertion hole through which the guide portion is inserted, a wall surfa...