ALEXANDRIA, Va., April 15 -- United States Patent no. 12,603,310, issued on April 14, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).

"Fuel cell system" was invented by Hiromichi Sato (Hadano, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A main object of the present disclosure is to provide a fuel cell system capable of rapidly determining occurrence of a leak. The present disclosure achieves the object by providing a fuel cell system comprising: a fuel cell, a coolant circuit that circulates a cooling liquid to cool the fuel cell, a conductivity meter that measures a conductivity of the cooling liquid, and a determination device that determines a leak of the cooling liquid; wherein the determin...