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Preselector
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Musical instrument
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Musical instrument with means for scanning keys
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Musical instrument with means for scanning keys
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Musical instrument with means for scanning keys
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Musical instrument with means for scanning keys
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Tone modifier
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Electroacoustical system
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Intensity rate of change control for musical instruments
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Electrical positioning device
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Progressively keyed electrical musical instrument
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Photoelectric scanning device for generating musical tones
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Photoelectric apparatus for generating musical tones
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Transmission line windows having high voltage breakdown characteristic
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