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Karaoke system with consumed calorie announcing function

Music – Accessories – Teaching devices
Patent

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Key depression indicating device for electronic musical instrume

Music – Accessories – Teaching devices
Patent

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Keyboard

Music – Accessories – Teaching devices
Patent

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Keyboard instrument teaching device

Music – Accessories – Teaching devices
Patent

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Keyboard instrument with touch responsive display unit

Music – Accessories – Teaching devices
Patent

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Keyboard musical instrument and electric tutor for guiding finge

Music – Accessories – Teaching devices
Patent

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Keyboard musical instrument with keyboard range indicator

Music – Accessories – Teaching devices
Patent

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Keyboard simulation with vertical inversion indexes

Music – Accessories – Teaching devices
Patent

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Kit and method for learning to play an instrument

Music – Accessories – Teaching devices
Reexamination Certificate

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