ALEXANDRIA, Va., June 17 -- United States Patent no. 12,317,020, issued on May 27, was assigned to FOSTER ELECTRIC COMPANY Ltd. (Tokyo).
"Headset" was invented by Takeshi Hanada (Tokyo), Ligang Liu (Tokyo) and Yusuke Kondou (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A headset of the present disclosure includes a housing 1 worn on user's ears, an ear-canal insertion portion 10 with a cylindrical shape provided at an ear-canal side of the housing 1 as a part of the housing 1, a driver 4 for outputting a signal provided inside the housing 1, and a microphone 5 provided at the back of a signal outputting surface of the housing 1 to acquire a response signal from a front of the driver 4."
The patent w...