ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,395, issued on Dec. 9, was assigned to Alpaqua Engineering LLC (Beverly, Mass.).
"Solid-core magnet" was invented by Olaf Stelling (Beverly Farms, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A solid-core ring-magnet having one or more cavities is provided. The magnet can have an overall cylindrical shape or a rectangular-prism shape. In either case, a portion of cavity walls of the magnet are ring shaped, causing the magnetic field lines to emanate from the magnet so that the bead formation is in the shape of a ring. A bead separation magnet having a discontinuous or segmented cavity wall is also provided. The segmented cavity wall causes be...