ALEXANDRIA, Va., March 17 -- United States Patent no. 12,581,241, issued on March 17, was assigned to PANASONIC AUTOMOTIVE SYSTEMS Co. LTD. (Kanagawa, Japan).
"Loudspeaker" was invented by Satoshi Itoh (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A loudspeaker includes: a diaphragm; a magnetic circuit; a frame that holds the magnetic circuit; an edge that is annular and connects the diaphragm and the frame; and a voice coil body that is disposed in a magnetic gap of the magnetic circuit. The diaphragm includes: a central portion; and an outer-circumferential portion that is provided as a single piece together with the central portion in an outer periphery of the central portion, and is bonded...