ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,474, issued on Feb. 3, was assigned to KOMATSU LTD. (Tokyo).
"Oil filter device" was invented by Masato Kageyama (Tokyo) and Shouta Seto (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An oil filter includes: a conductive valve body disposed in a passage provided in a space of a filter case; a conductive valve shaft supported by the valve body via an insulator; a conductive valve disc movably supported by the valve shaft and closing the passage by contacting with the valve body; a valve elastic member generating an elastic force to bring the valve disc into contact with the valve body; a conductive movable member, connected to the valve body, c...