ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,213,931, issued on Feb. 4, was assigned to Kongguan Yueya Technology Co. Ltd. (Dongguan, China), Dongguan Hongxiang Electronic Technology Co. Ltd. (Dongguan, China) and Shenzhen Zhonghongtian Technology Co. Ltd. (Shenzhen, China).
"Sexual stimulation device" was invented by Dongjun Wu (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sexual stimulation device includes a shell and a driving mechanism being provided in the shell. The shell is configured to be inserted into the human body, and includes a massage portion made of flexible material. The driving mechanism includes a gearbox and a driving rod. The driving rod includes a first en...