ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,836, issued on June 3, was assigned to DENSO Corp. (Kariya, Japan), TOYOTA JIDOSHA K.K. (Toyota, Japan) and AISIN Corp. (Kariya, Japan).

"Insulation inspection method and insulation inspection apparatus" was invented by Yuki Kosaka (Kariya, Japan), Hideyuki Satou (Toyota, Japan) and Hideaki Kimura (Kariya, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "In an insulation inspection method for detecting creeping discharge that occurs in a coil in an armature, a predetermined impulse voltage is applied to the coil, and an electrical current value of a current that flows to a current detector that is connected to the coil is detected. The detected e...