ALEXANDRIA, Va., May 5 -- United States Patent no. 12,616,348, issued on May 5, was assigned to Beijing Roborock Technology Co. Ltd. (Beijing).
"Handheld cleaning device" was invented by Yunlong Yang (Haidian District, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A handheld cleaning device includes a surface-moving portion and an upright portion. The surface-moving portion is in contact with a surface to be cleaned and is connected with the upright portion. The upright portion is configured to move the surface-moving portion in a case in which the surface-moving portion is in operation. The handheld cleaning device further includes a power battery configured to supply power to the handheld cleaning d...