ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,552,271, issued on Feb. 17, was assigned to YANMAR HOLDINGS Co. LTD. (Osaka, Japan).

"Fuel cell ship" was invented by Manabu Shinagawa (Osaka, Japan), Takehiro Maruyama (Osaka, Japan), Yasuyoshi Yamaguchi (Osaka, Japan), Takuya Hiraiwa (Osaka, Japan) and Yukihiko Kimura (Kunisaki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An exemplary fuel cell ship is a fuel cell ship for propelling a hull by using electric power supplied by a fuel cell that generates electric power through an electrochemical reaction of fuel, and includes at least one compartment including an emission source of the fuel, and a vent pipe through which the fuel in the compart...