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Variable speed pumping systems
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Patent number 11,898,531
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Issue date Feb 13, 2024
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Hitachi Mitsubishi Hydro Corporation
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Masahiro Yoshida
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Variable speed generator/motor device
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Patent number 11,223,310
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Issue date Jan 11, 2022
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Hitachi Mitsubishi Hydro Corporation
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Akira Bando
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Pumped storage power plant
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Patent number 9,494,127
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Issue date Nov 15, 2016
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Hitachi Mitsubishi Hydro Corporation
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Yukio Hongawa
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F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
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Rotor of rotating electrical machine
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Patent number 8,421,318
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Issue date Apr 16, 2013
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Hitachi Mitsubishi Hydro Corporation
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Takeshi Kuwahara
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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85440978 - HM HYDRO
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Serial number 85440978
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Registration number 4266665
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Filing date Oct 6, 2011
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Hitachi Mitsubishi Hydro Corporation
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7 - Machines and machine tools