ALEXANDRIA, Va., April 21 -- United States Patent no. 12,609,587, issued on April 21, was assigned to DR. ING. H.C. F. PORSCHE AG (Stuttgart, Germany).

"Cooling system for an electric traction machine for a motor vehicle" was invented by Simon Kuebler (Untergruppenbach Unterheinriet, Germany) and Stefan Oechslen (Stuttgart, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cooling system for an electric traction machine for a motor vehicle includes a looped conduit system for conducting a first cooling liquid and a circulation pump for conveying the first cooling liquid in the looped conduit system in a first circulation direction. The system further includes an expansion tank filled at least partiall...