GENEVA, Nov. 18 -- HITACHI MITSUBISHI HYDRO CORPORATION (29-14, Shiba 5-chome, Minato-ku, Tokyo1080014), 日立三菱水力株式会社 (東京都港区芝五丁目２９番１４号), HITACHI, LTD. (6-6, Marunouchi 1-chome, Chiyoda-ku, Tokyo1008280), 株式会社日立製作所 (東京都千代田区丸の内一丁目６番６号) filed a patent application (PCT/JP2024/017184) for "CONTROL DEVICE FOR AC EXCITATION GENERATOR MOTOR" on May 08, 2024. With publication no. WO/2025/234039, the d...