ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,725,811, issued on Sept. 1, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).
"Heat exchanger" was invented by Masaaki Matsusue (Mishima, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A heat exchanger may include: a first flow path; a second flow path exchanging heat with the first flow path; a third flow path exchanging heat with the second flow path; and a fourth exchanging heat with the third flow path, wherein each of the first and the third flow path may be connected to one of a flow path for fuel gas to be supplied to a fuel cell and a flow path for cooling water to be supplied to the fuel cell; and each of the second and the fourth flow...