ALEXANDRIA, Va., June 4 -- United States Patent no. 12,323,759, issued on June 3, was assigned to Polk Audio LLC (Vista, Calif.).
"Elliptical ring radiator diaphragm, tweeter and damping method" was invented by Sean O'Brien Sr. (Harwood, Md.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A loudspeaker driver or tweeter (e.g., 100, 200 or 300) having a voice coil connected with a loudspeaker diaphragm (e.g., 106, 206 or 306), having a substantially circular diaphragm portion which is connected with or rests upon a voice coil attachment segment (e.g., 104, 204, 304). The diaphragm also includes a first central elliptical (non-circular-shaped) inner roll portion (e.g., 112, 212, 312) defining a central recessed...