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Electrostatic loudspeaker
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Patent number 8,983,099
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Issue date Mar 17, 2015
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Yamaha Corporation
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Yasuaki Takano
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Photocatalyst granules
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Patent number 6,914,031
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Issue date Jul 5, 2005
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Yamaha Corporation
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Yoichi Nagasaki
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Electro-coagulation printer
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Patent number 6,348,938
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Issue date Feb 19, 2002
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Yamaha Corporation
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Kunimasa Muroi
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Racket frame
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Patent number 4,858,928
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Issue date Aug 22, 1989
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Yamaha Corporation
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Kunimasa Muroi
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A63 - SPORTS GAMES AMUSEMENTS
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Racket and weight attachment
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Patent number 4,697,811
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Issue date Oct 6, 1987
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Nippon Gakki Seizo Kabushiki Kaisha
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Kunimasa Muroi
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A63 - SPORTS GAMES AMUSEMENTS
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Racket
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Patent number 4,145,047
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Issue date Mar 20, 1979
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Nippon Gakki Seizo Kabushiki Kaisha
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Itsushi Nagamoto
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A63 - SPORTS GAMES AMUSEMENTS