ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,537, issued on April 14, was assigned to Dongguan Yanshi Electronic Technology Co. Ltd. (Dongguan, China).
"Massage structure with variable inner diameter" was invented by Yanyan Su (Hefei, China) and Wenqiang Wu (Jingzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A massage structure with a variable inner diameter includes a deformation assembly and a rotating sleeve, where the deformation assembly is sleeved outside a first massage area; the deformation assembly includes a deformation portion, a constraint portion, and a first engaging portion, where the constraint portion and the first engaging portion are respectively disposed at bot...