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Permanent magnet field DC machine
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Patent number 4,794,291
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Issue date Dec 27, 1988
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Hitachi, Ltd.
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Toshimi Abukawa
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Rotor of induction motor
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Patent number 4,777,396
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Issue date Oct 11, 1988
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Hitachi, Ltd.
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Motoya Ito
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Sliding current collector
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Patent number 4,657,818
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Issue date Apr 14, 1987
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Hitachi, Ltd.
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Nobuyuki Yamashita
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H01 - BASIC ELECTRIC ELEMENTS
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Squirrel-cage induction motor
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Patent number 4,562,397
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Issue date Dec 31, 1985
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Hitachi, Ltd.
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Yukio Kitabayashi
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Stator of D.C. rotary machine
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Patent number 4,451,752
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Issue date May 29, 1984
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Hitachi, Ltd.
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Kazuo Tahara
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Induction motor
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Patent number 4,409,506
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Issue date Oct 11, 1983
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Hitachi, Ltd.
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Motoya Ito
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Electric rotary machine
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Patent number 4,316,113
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Issue date Feb 16, 1982
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Hitachi, Ltd.
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Masaki Sato
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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