ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,487,087, issued on Dec. 2, was assigned to Tokyo Keiki Inc. (Tokyo).
"Gyrocompass" was invented by Takuya Watanabe (Tokyo), Takashi Koyama (Tokyo) and Shota Nishiizumi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A gyrocompass includes: a binnacle; a gyro case having a gyro rotor; a vertical ring mounted on the binnacle for rotation about a vertical axis, the vertical axis extending perpendicular to a gimbal axis and a horizontal axis, the gimbal axis extends in a direction of a spin axis of the gyro rotor and the horizontal axis extends perpendicular to the gimbal axis and parallel to a horizontal plane; a horizontal ring supported by the verti...