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Amelioration of the tune of musical instruments

G - Physics – 10 – B
Patent

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Chromatic harmonica

G - Physics – 10 – B
Patent

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Chromatic harmonica

G - Physics – 10 – B
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Device for detecting a key switch operation

G - Physics – 10 – B
Patent

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Device for harmonicas

G - Physics – 10 – B
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Device for practising harmonica technique

G - Physics – 10 – B
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Electro-mechanical keyboard memory for an electronic musical...

G - Physics – 10 – B
Patent

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Harmonica

G - Physics – 10 – B
Patent

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Harmonica

G - Physics – 10 – B
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Harmonica

G - Physics – 10 – B
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Harmonica lip shield

G - Physics – 10 – B
Patent

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Harmonicas

G - Physics – 10 – B
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Harmonichord instrument

G - Physics – 10 – B
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Keyboard for a musical instrument

G - Physics – 10 – B
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Musical instrument

G - Physics – 10 – B
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Musical instrument

G - Physics – 10 – B
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Musical keyboard

G - Physics – 10 – B
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Organ pipes

G - Physics – 10 – B
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Plastic harmonica

G - Physics – 10 – B
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Prokon

G - Physics – 10 – B
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