ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,551,399, issued on Feb. 17.
"Spiral peristaltic adult article technology" was invented by Xuejiang Zhou (Chongqing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The application relates to the technical field of adult articles, and discloses a spiral crawling adult article technology, which comprises a shell 1 connected with a shell 2, wherein a driving component is installed in the shell 2; The telescopic rod is used for driving the driving motor to linearly reciprocate; The screw rod is movably provided with balls outside; A shell 3, in which a vibration motor is installed; The outer sleeve is sleeved outside the first shell, and the second she...