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Rotation device and power supply system
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Patent number 9,803,733
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Issue date Oct 31, 2017
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Simple Tokyo Co., Ltd.
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Megumi Miyagawa
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Rotation maintaining device
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Patent number 9,236,779
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Issue date Jan 12, 2016
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Simple Tokyo Co., Ltd.
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Megumi Miyagawa
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Rotation device
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Patent number 8,604,628
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Issue date Dec 10, 2013
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Simple Tokyo Co., Ltd.
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Keiko Kondo
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...