4. Music
  5. Instruments

Richard S. Swain

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Apparatus for reinforcing notes selected by more than one key

Music – Instruments
Patent

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Automatic rhythm generator

Music – Instruments
Patent

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Electronic musical instrument with means for automatically gener

Music – Instruments
Patent

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Security alarm system

Communications: electrical – Audible indication – Pneumatic-type sound producer
Patent

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Selection switch memory circuit

Communications: electrical – Digital comparator systems
Patent

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Profile ID: LFUS-PAI-P-479375

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