ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,403,504, issued on Sept. 2, was assigned to Derrick Corp. (Buffalo, N.Y.).

"Apparatuses, methods, and systems for vibratory screening" was invented by James R. Colgrove (East Aurora, N.Y.) and Michael L. Peresan (Strykersville, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Vibratory screening machines that include stacked screening deck assemblies are provided. In some embodiments, at least one of the vibratory screening machines can include an outer frame, an inner frame connected to the outer frame, and a vibratory motor assembly secured to the inner frame for vibrating the inner frame. A plurality of screen deck assemblies can be attached to th...