ALEXANDRIA, Va., April 21 -- United States Patent no. 12,604,974, issued on April 21, was assigned to NINGBO HEALTHKEY MOTION TECHNOLOGY Co. LTD. (Ningbo, China).
"Lifting column" was invented by Dongtong Ye (Cixi City, China), Xuliang Gong (Cixi City, China), Zhuangyan Rong (Cixi City, China) and Junsheng Zhang (Cixi City, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lifting column, including: a column body and a foot, an insert-joint assembly being provided at the bottom of the column body, a snap groove being provided on the insert-joint assembly, the foot including a base and an insert-joint socket, a receptacle configured to receive the insert-joint assembly and an elastic snap-fit assembly di...