ALEXANDRIA, Va., March 5 -- United States Patent no. 12,241,444, issued on March 4, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).

"Power generation device" was invented by Yukihiko Ideshio (Nisshin, Japan), Naoyuki Miyara (Nagoya, Japan), Akira Hanamaki (Toyota, Japan) and Kazuhiko Yuasa (Okazaki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The power generation device disclosed in the present specification includes a first rotating body, a second rotating body, a differential device, and a generator. The first rotating body and the second rotating body convert energy of the fluid into rotational motion. The differential device is connected to the first rotating body via a first transmission p...