US Patent 10441097 Surface marking device and method of use thereof

A device for marking a picture hanging spot on a mounting surface has a general U-shape encompassed by a support base, a front arm and a rear arm. The device is further provided with at least one bore, at least one pressing rod adjustably engaging within the bore, a plurality of padding means inward the U-shape, and a marking means on the rear arm facing the mounting surface. Therein, the pressing rod and the marking means are coaxially aligned, and the axis thereof is substantially perpendicular to the picture hanging spot on the mounting surface. Thereby, the pressure exerted on the pressing rod transfers through the axis thereof to the marking means that leaves a mark on the mounting surface.