ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,722,660, issued on Sept. 1, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).

"Autonomous mobile body and vehicle system" was invented by Masashi Nakamura (Tokyo), Masahiro Iwamoto (Nisshin, Japan) and Takao Kataoka (Nagoya, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An autonomous mobile body comprises a travel unit configured to move autonomously; a locker unit capable of housing an object; a first power source unit configured to supply electric power to the travel unit; and a second power source unit including at least one hydrogen cartridge, the second power source unit being configured to supply electric power to the locker unit by hydr...