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Valve operating system for engine
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Patent number 6,170,449
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Issue date Jan 9, 2001
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Yamaha Hatsudoki Kabushiki Kaisha
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Yuji Saiki
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Cylinder head and flow passage therefor
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Patent number 5,809,968
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Issue date Sep 22, 1998
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Yamaha Hatsudoki Kabushiki Kaisha
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Naoki Tsuchida
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Variable valve timing mechanism
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Patent number 5,809,953
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Issue date Sep 22, 1998
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Yamaha Hatsudoki Kabushiki Kaisha
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Tetsushi Saito
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Variable valve timing mechanism
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Patent number 5,785,017
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Issue date Jul 28, 1998
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Yamaha Hatsudoki Kabushiki Kaisha
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Tetsushi Saito
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Direct injected engine
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Patent number 5,735,240
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Issue date Apr 7, 1998
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Yamaha Hatsudoki Kabushiki Kaisha
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Takeshi Ito
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Induction system for engine
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Patent number 5,575,254
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Issue date Nov 19, 1996
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Yamaha Hatsudoki Kabushiki Kaisha
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Naoki Tsuchida
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Direct injected engine
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Patent number 5,529,038
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Issue date Jun 25, 1996
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Yamaha Hatsudoki Kabushiki Kaisha
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Naoki Tsuchida
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Multiple valve internal combustion engine
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Patent number 5,018,497
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Issue date May 28, 1991
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Yamaha Hatsudoki Kabushika Kaisha
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Naoki Tsuchida
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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