ALEXANDRIA, Va., March 24 -- United States Patent no. 12,587,052, issued on March 24, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).
"Electric motor" was invented by Kei Ohta (Toyota, Japan), Hideaki Miyazono (Kasugai, Japan), Junya Kobayashi (Ama, Japan), Junichi Deguchi (Toyota, Japan), Hironori Asaoka (Okazaki, Japan) and Sho Okazaki (Toyota, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electric motor disclosed herein may comprise a rotor core fixed to a shaft, a stator, and first and second refrigerant passages. The stator may include coil ends at both ends. The first refrigerant passage may be provided in the shaft and arranged outside the rotor core in an axial direction of the shaft. ...