ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,424,650, issued on Sept. 23, was assigned to Robert Bosch GmbH (Stuttgart, Germany).

"Fuel cell system assembly" was invented by Bernhard Zickgraf (Neckarsulm, Germany) and Sebastian Nuber (Stuttgart, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a fuel cell system assembly comprising at least two coupled fuel cell systems (A, B) that can be operated at different load points, each fuel cell system (A, B) being connected to a respective cooling circuit (3A, 3B) comprising a circulating coolant, via a coolant supply line (1A, 1B) and a coolant drain line (2A, 2B). According to the invention, the cooling circuits (3A, 3B)...