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Wind turbine generator system
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Patent number 8,466,573
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Issue date Jun 18, 2013
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Hitachi, Ltd.
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Akira Kikuchi
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F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
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Wind turbine generator system
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Patent number 8,242,620
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Issue date Aug 14, 2012
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Hitachi, Ltd.
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Akira Kikuchi
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F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
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Wind turbine generator system
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Patent number 7,952,216
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Issue date May 31, 2011
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Hitachi, Ltd.
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Akira Kikuchi
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F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
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Wind turbine generator system
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Patent number 7,615,880
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Issue date Nov 10, 2009
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Hitachi, Ltd.
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Akira Kikuchi
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Wind turbine generator system
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Patent number 7,268,443
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Issue date Sep 11, 2007
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Hitachi, Ltd.
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Akira Kikuchi
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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