ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,770, issued on Jan. 27.
"Vibrating stone grinder" was invented by Shaojuan Lin (Shantou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vibrating stone grinder, comprising a lower housing, an upper housing and a control panel, wherein the upper housing is fixedly connected to an upper surface of the lower housing, a protective cover is arranged on an inner wall of the upper housing, and the control panel is arranged at a joint position of the upper housing and the lower housing, wherein the control panel comprises a assembly main board, the assembly main board is bolted to the inner wall of the lower housing, a surface of the assembly main b...