ALEXANDRIA, Va., June 2 -- United States Patent no. 12,643,340, issued on June 2.
"Automated rotary image generation" was invented by Cole W. Kraus (Wakefield, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rendering device forms a rotary pattern in a granular medium using a rotating arm having a distal end and a proximate end, where the distal end defines an outer radius and the proximate end defines an inner radius of a circular planar medium with a thin sand layer. A motor attached to the rotating arm for rotation about a center axis, and a spur gear rotationally attaches to the proximate end. An elongated rendering member pivotally attaches between the distal end and a radial location on the spur...