ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,967, issued on Dec. 23, was assigned to YANMAR HOLDINGS Co. LTD. (Osaka, Japan).

"Fuel cell ship" was invented by Takuya Hiraiwa (Osaka, Japan), Takehiro Maruyama (Osaka, Japan), Yasuyoshi Yamaguchi (Osaka, Japan), Manabu Shinagawa (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 from a fuel cell that generates electric power through an electrochemical reaction of fuel, and includes a compartment including an emission source of the fuel and a first detector arranged in the compartment to detect the ...