ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,106, issued on Oct. 21, was assigned to KAY SEVEN Co. LTD. (Tokyo).

"Gate rudder including left rudder and right rudder disposed left and right of propeller of ship" was invented by Sadatomo Kuribayashi (Tokyo) and Noriyuki Sasaki (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "To provide a gate rudder capable of reducing energy consumption during a voyage of a ship.A gate rudder including a pair of rudders including a left rudder and a right rudder disposed left and right, respectively, of a propeller at a stern, wherein each of the rudders includes a first rudder portion extending in a horizontal direction and a second rudder porti...