ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,753,713, issued on Oct. 6, was assigned to YANMAR HOLDINGS Co. LTD. (Osaka, Japan).

"Engine device" was invented by Kenta Mitarai (Osaka, Japan) and Ken Kawabe (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An engine device is an engine device comprising an engine which is operated by a fuel containing at least ammonia, and comprises: an exhaust passage through which the exhaust gas exhausted from the engine is flowed in the exhaust direction; a selective reduction catalyst which is provided in the exhaust passage and reduces nitrogen oxides contained in the exhaust gas by a reducing agent; an ammonia adsorption catalyst which is provided i...