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Key-to-be-depressed designating and comparing apparatus using a

Music – Instruments – Electrical musical tone generation
Patent

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Key-touch state detection device for an automatic performance pi

Music – Instruments – Electrical musical tone generation
Patent

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Key-touch value control device of electronic key-type musical in

Music – Instruments
Patent

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Keyboard

Music – Instruments – General features
Patent

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Keyboard

Music – Accessories – Teaching devices
Patent

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Keyboard

Music – Instruments – General features
Patent

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Keyboard and method for manufacturing the same

Music – Instruments – Electrical musical tone generation
Reexamination Certificate

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Keyboard and notation system

Music – Instruments – General features
Patent

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Keyboard apparatus

Music – Instruments – General features
Reexamination Certificate

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Keyboard apparatus

Music – Instruments – General features
Reexamination Certificate

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Keyboard apparatus

Music – Instruments – General features
Reexamination Certificate

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Keyboard apparatus

Music – Instruments
Patent

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Keyboard apparatus

Music – Instruments – General features
Reexamination Certificate

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Keyboard apparatus

Music – Instruments – General features
Reexamination Certificate

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Keyboard apparatus

Music – Instruments – General features
Reexamination Certificate

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Keyboard apparatus

Music – Instruments – General features
Reexamination Certificate

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Keyboard apparatus

Music – Instruments – General features
Reexamination Certificate

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Keyboard apparatus

Music – Instruments – Electrical musical tone generation
Reexamination Certificate

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Keyboard apparatus

Music – Instruments – Stringed
Reexamination Certificate

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Keyboard apparatus

Music – Instruments – General features
Reexamination Certificate

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