ALEXANDRIA, Va., March 19 -- United States Patent no. 12,256,206, issued on March 18, was assigned to GOERTEK INC. (Shandong, China).

"Diaphragm for sound producing device, sound producing device, and method for assembling the same" was invented by Fengguang Ling (Shandong, China), Shuqiang Wang (Shandong, China), Chun Li (Shandong, China) and Chunfa Liu (Shandong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A diaphragm applied to a sound producing device, a sound producing device, and a method for assembling the same. The diaphragm comprises a film layer prepared by means of a crosslinking reaction of at least one of an ethylene-acrylate copolymer and an ethylene-acrylate-carboxylic acid copolymer....