ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,413,889, issued on Sept. 9, was assigned to FOSTER ELECTRIC COMPANY Ltd. (Tokyo).
"Driver holder, driver module, and headset" was invented by Jun Iwase (Tokyo) and Chiaki Koike (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A driver holder is disposed inside a housing. This driver holder has a tubular portion formed in a tubular shape, and a driver is accommodated inside the tubular portion. Further, the tubular portion is press-fitted into a module case arranged inside the housing. Here, an opening at one end side in an axial direction of the tubular portion configures a first sound path that communicates the driver with the exterior of the hou...