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Plunger driving structure
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Patent number 8,267,590
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Issue date Sep 18, 2012
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NTN Corporation
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Shingo Kono
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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One-way clutch
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Patent number 6,220,414
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Issue date Apr 24, 2001
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Bando Chemical Industries, Ltd.
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Shuichi Nagaya
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Thrust ball bearing
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Patent number 5,758,978
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Issue date Jun 2, 1998
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NTN Corporation
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Masahiko Satoda
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES