DK7863C
(en)
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Device for recording 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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DK7187C
(en)
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Automatic device for producing and reproducing sounds and tones.
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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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DK9196C
(en)
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Music register for automatic musical instruments and device for the production of the same.
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DK17791C
(en)
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Procedure for recording and reproducing tones.
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DK11099C
(en)
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Sound amplification device for gramophones.
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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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DK10141C
(en)
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Device for sounders for phonographs, gramophones and the like.
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FR328513A
(en)
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An amplifier for phonographs and graphophones
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FR363503A
(en)
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Apparatus for the reproduction on keyboard instruments of pieces of music recorded on tapes
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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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FR404704A
(en)
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Reproduction device for sound instruments
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FR334753A
(en)
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Diaphragm amplifier and tensioner for phonograph and graphophone
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ES37342A3
(en)
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Improvements in sound recorders for gramophones and analog instruments sound recorders and reproducers.
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CH33148A
(en)
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Sound reproduction disc for grammophones
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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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FR385752A
(en)
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Damper system for pianos
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CH36572A
(en)
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Reproducer for phonographs
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FR391714A
(en)
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Gramophonic or phonographic device for reproducing duets, trios, etc., and singing with orchestral accompaniment
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ES37277A1
(en)
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An apparatus for the reproduction and amplification of sounds.
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DK7147C
(en)
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Device for Phonographs with swivel sound funnel.
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FR329850A
(en)
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Reproductive diaphragm for phonographs and graphophones, called "the virtuoso"
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FR377396A
(en)
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Phonograph combined with string vibrator for sound amplification
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DK11042C
(en)
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Device for Gramophones.
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