ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,494,684, issued on Dec. 9, was assigned to Robert Bosch GmbH (Stuttgart, Germany).

"Rotor of an electric machine" was invented by Peter Theisinger (Markgroeningen, Germany), Adrian Heinrich Sichau (Holzgerlingen, Germany), Daniel Klis (Korntal-Muenchingen, Germany), Juergen Fridrich (Stuttgart, Germany), Kurt Reutlinger (Stuttgart, Germany), Marcus Alexander (Ludwigsburg, Germany) and Mohammad Nassar Albunni (Sindelfingen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rotor includes a rotor body. A plurality of the rotor poles have a two-layer magnet assembly. Each magnet assembly includes an inner layer of at least three magnets and an outer ...