ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,039, issued on Oct. 14, was assigned to New-Tec Integration (Xiamen) Co. Ltd. (Xiamen, China).

"Elastic module comprising springs in multiple layers and elastic mattress" was invented by Luhao Leng (Xiamen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An elastic module comprising springs in multiple layers comprises springs in a first layer of the multiple layers, springs in a second layer of the multiple layers, and a flexible material balancing layer. The springs in the first layer are arranged in rows and lines to form a preset shape or staggered in rows to form the preset shape, the springs in the second layer are disposed on the springs...