ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,394,810, issued on Aug. 19, was assigned to YANMAR HOLDINGS Co. LTD. (Osaka, Japan).
"Fuel cell ship" was invented by Yasuyoshi Yamaguchi (Osaka, Japan), Takehiro Maruyama (Osaka, Japan), Takuya Hiraiwa (Osaka, Japan), Manabu Shinagawa (Osaka, Japan) and Yukihiko Kimura (Kunisaki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fuel cell ship includes a propulsion device that generates propulsive force on a hull by electric power, an electric power supply unit that supplies the electric power to the propulsion device, and a degradation rate control unit that adjusts a degradation rate. The electric power supply unit includes a plurality of fuel c...