ALEXANDRIA, Va., July 28 -- United States Patent no. 12,693,250, issued on July 28, was assigned to NIPPON PILLAR PACKING Co. LTD. (Osaka, Japan).

"Oil state detection apparatus" was invented by Akira Nakatsu (Osaka, Japan), Kento Nakagawa (Osaka, Japan) and Kentaro Watanabe (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An oil state detection apparatus detects the amount of degradation substances contained in oil. The oil state detection apparatus includes a first oscillation circuit including a coil 1 and a capacitor 2, and a first detection device. Either one of the coil 1 or the capacitor 2 is configured to be immersed in oil. The first detection device is configured to detect the oscillato...