4. Music
  5. Instruments

Donald K. Coles

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Apparatus for musical scale selection and key signature actuatio

Music – Instruments – General features
Patent

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Electronic musical instrument

Music – Instruments
Patent

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Electronic musical instrument

Music – Instruments
Patent

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Electronic musical instrument

Music – Accessories – Teaching devices
Patent

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Electronic musical instrument

Music – Instruments
Patent

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Profile ID: LFUS-PAI-P-5727

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