ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,549,903, issued on Feb. 10, was assigned to Vanson Electronics (Nanhai) Co. Ltd. (Foshan, China).
"Micro-speaker device" was invented by Hao-Chien Hsu (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A micro-speaker includes a frame and a drum paper including a diaphragm and a surround. The diaphragm is flexibly connected to one end of the frame via the surround, thereby forming a first suspension system. A magnetic structure includes a main magnetic portion and a yoke covering and surrounding the main magnetic portion. A magnetic gap is provided between the main magnetic portion and a folded portion of the yoke. A voice coil is sleeved on...