ALEXANDRIA, Va., June 17 -- United States Patent no. 12,316,167, issued on May 27, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan), AISIN Corp. (Kariya, Japan) and DENSO Corp. (Kariya, Japan).
"Rotor core" was invented by Takashi Imakawa (Okazaki, Japan), Yutaka Ueno (Nisshin, Japan), Masahiro Horiuchi (Toyota, Japan), Takuya Hashimoto (Ohbu, Japan), Kenji Fukuzaki (Toyota, Japan), Yusuke Yamamoto (Kariya, Japan) and Nobuhiro Asano (Kariya, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotor core includes a shaft hole, into which a shaft is inserted, and keys, which are protrusions corresponding to keyways of the shaft. A radial distance, which is the distance from the center of the shaft hole t...