ALEXANDRIA, Va., June 19 -- United States Patent no. 12,332,312, issued on June 17, was assigned to AVL List GmbH (Graz, Austria).

"Test method for testing a disconnection function of a main switch device of an electrical connection device of a fuel cell system" was invented by Katharina Weingrill (Stallhofen, Austria) and David Weingrill (Stallhofen, Austria).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a test method for testing the disconnection function of a main switch device (110) of an electrical connection device (100) of a fuel cell system (200), the method having the following steps: generating a voltage variation (VV) on the low-voltage side (LVS) of a transformer ...