ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,424,644, issued on Sept. 23, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).

"Service providing mobile unit" was invented by Masashi Nakamura (Toyota, Japan), Zixun Mei (Tokyo-to, Japan) and Nobuyuki Tomatsu (Nagoya, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A service providing mobile unit comprising the frame 2, movement-use wheels 4, 5 provided at the bottom part of the frame 2, hydrogen storage tank insert parts 10 formed inside the frame 2, and the fuel cell 40 arranged in the frame 2. A service for supplying hydrogen to the fuel cell 40 from the hydrogen storage tank 20 inserted in the hydrogen storage tank insert part 10, a servic...