ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,765,742, issued on Oct. 20, was assigned to BEIJING ROBOROCK TECHNOLOGY Co. LTD. (Beijing).
"Mopping module and cleaning head" was invented by Jinyi Liu (Beijing), Peng Lei (Beijing), Liang Qiao (Beijing) and Xu Li (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "A mopping module and a cleaning head. The mopping module includes a water tank, a mopping cloth, and a water volume control mechanism. A water tank hole is provided at a bottom portion of the water tank; the water tank hole communicates with the interior of the water tank; the mopping cloth is provided outside the bottom portion of the water tank; the water volume control mechanism compr...