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DK7187C
(en)
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Automatic device for producing and reproducing sounds and tones.
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DK7862C
(en)
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Device for recording and reproducing sounds and tones.
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DK7863C
(en)
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Device for recording and reproducing sounds and tones.
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ES36403A1
(en)
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An automatic musical device.
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DK9196C
(en)
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Music register for automatic musical instruments and device for the production of the same.
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ES36523A1
(en)
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A musical device called the Automatic Harmonica.
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DK7039C
(en)
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Automatic telephone setting device.
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ES37277A1
(en)
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An apparatus for the reproduction and amplification of sounds.
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DK7544C
(en)
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Device for writing down pieces of music played on keyboard instruments.
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CH36572A
(en)
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Reproducer for phonographs
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DK7203C
(en)
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Device for Lifting the Sound Body from the Playboard in a Gramophone.
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FR385752A
(en)
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Damper system for pianos
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DK17044C
(en)
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Device for Pianos and Other String Instruments for Regulating the Sound.
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DK17791C
(en)
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Procedure for recording and reproducing tones.
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ES42091A1
(en)
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An industrial result "Mechanical piano with chiseled sounds".
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CH31330A
(en)
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Automatic winding device on clockworks
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ES35658A1
(en)
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Phonograph improvements.
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DK7386C
(en)
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Resonance Head for Apparatus for Recording or Reproducing Sound and Tones.
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FR356455A
(en)
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Automatic piano
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FR384677A
(en)
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Method and device for actuating the sound amplifying mechanism for talking machines
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DK9850C
(en)
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Apparatus for Making Autotypic Negatives.
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DK7547C
(en)
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Device for Making One-Sided Colored Paper.
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CH33148A
(en)
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Sound reproduction disc for grammophones
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DK10262C
(en)
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Device for Wireless Transmission of Sound Waves.
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CH34186A
(en)
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Advanced phonograph
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