ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,747,029, issued on Sept. 29, was assigned to MITSUBISHI HEAVY INDUSTRIES LTD. (Tokyo).

"Electric propulsion device with hollow shaft and cooling blades and support body with heat member on outer surface" was invented by Yuki Morisaki (Tokyo), Junji Iwatani (Tokyo), Tsuyoshi Kitamura (Tokyo), Takehiko Imai (Tokyo), Yasutaka Aoki (Tokyo), Satoshi Yonemoto (Tokyo) and Masayuki Sakai (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electric propulsion device includes a hollow shaft having a shaft flow path, which extends in a direction of an axis, formed therein, a boss portion having a space formed therein, a plurality of blades having a blade flo...