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Keyboard musical instrument having hammer stopper exactly positi

Music – Instruments – Electrical musical tone generation
Patent

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Keyboard musical instrument having height controllable pedals

Music – Instruments – General features
Reexamination Certificate

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Keyboard musical instrument having jacks changeable in escape sp

Music – Instruments – Combined
Patent

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Keyboard musical instrument having key action mechanisms movable

Music – Instruments – Combined
Patent

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Keyboard musical instrument having key action mechanisms movable

Music – Instruments – Combined
Patent

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Keyboard musical instrument having key inertia device

Music – Instruments – General features
Patent

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Keyboard musical instrument having key touch controller

Music – Instruments – Electrical musical tone generation
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Keyboard musical instrument having key touch controller for givi

Music – Instruments – Electrical musical tone generation
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Keyboard musical instrument having key-touch generator changing

Music – Instruments – Electrical musical tone generation
Patent

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Keyboard musical instrument having keys equipped with...

Music – Instruments – General features
Reexamination Certificate

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Keyboard musical instrument having keys equipped with...

Music – Instruments – Electrical musical tone generation
Reexamination Certificate

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Keyboard musical instrument having keys regulated with...

Music – Instruments – General features
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Keyboard musical instrument having keys regulated with...

Music – Instruments – General features
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Keyboard musical instrument having regulable regulating buttons

Music – Instruments – Combined
Patent

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Keyboard musical instrument having sloped top surface

Music – Instruments – General features
Reexamination Certificate

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Keyboard musical instrument having split rear top board...

Music – Instruments – Stringed
Reexamination Certificate

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Keyboard musical instrument having top board coupled with...

Music – Instruments – General features
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Keyboard musical instrument having top board coupled with...

Music – Instruments – General features
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Keyboard musical instrument having variable contact point betwee

Music – Instruments – Stringed
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Keyboard musical instrument performable without noise in silent

Music – Instruments – Automatic
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