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Engine cam shaft drive incorporating VVT
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Patent number 6,325,031
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Issue date Dec 4, 2001
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Yamaha Hatsudoki Kabushiki Kaisha
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Tomotaka Takano
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Accessory drive for engine
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Patent number 6,148,787
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Issue date Nov 21, 2000
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Yamaha Hatsudoki Kabushiki Kaisha
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Tomotaka Takano
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Cylinder head for engine
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Patent number 5,560,331
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Issue date Oct 1, 1996
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Yamaha Hatsudoki Kabushiki Kaisha
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Kenji Komatsu
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Cylinder head for engine
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Patent number 5,531,194
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Issue date Jul 2, 1996
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Yamaha Hatsudoki Kabushiki Kaisha
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Kenji Komatsu
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS