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Superconducting bearing device
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Patent number 5,763,971
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Issue date Jun 9, 1998
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Koyo Seiko Co., Ltd.
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Ryoichi Takahata
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Magnetic drive device
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Patent number 5,270,600
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Issue date Dec 14, 1993
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Koyo Seiko Co. Ltd.
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Taisaku Hashimoto
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Magnetic drive device
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Patent number 5,209,699
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Issue date May 11, 1993
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Koyo Seiko Co., Ltd.
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Taisaku Hashimoto
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS