DK7544C
(en)
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Device for writing down pieces of music played on keyboard instruments.
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DK7263C
(en)
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Keyboard for Musical Instruments.
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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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FR377554A
(en)
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Keyboards for musical instruments
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CH34766A
(en)
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Innovation on two-course string instruments
|
FR387763A
(en)
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Music instrument
|
DK6742C
(en)
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Apparatus for the Development of Piano Playing Finger Technique.
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FR368240A
(en)
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Music instrument
|
FR385980A
(en)
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Automatic musical instrument
|
FR351869A
(en)
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New musical instrument
|
ES36403A1
(en)
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An automatic musical device.
|
FR367566A
(en)
|
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Piano violin
|
FR362475A
(en)
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Piano Improvements
|
FR363503A
(en)
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Apparatus for the reproduction on keyboard instruments of pieces of music recorded on tapes
|
FR371057A
(en)
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Keyboard phonograph
|
FR335745A
(en)
|
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Automatic musical instrument
|
FR330324A
(en)
|
|
Automatic musical instrument
|
CH29818A
(en)
|
|
Automatic musical instrument
|
FR333483A
(en)
|
|
Music instrument
|
DK6415C
(en)
|
|
Device for Pianos.
|
FR349280A
(en)
|
|
Automatic musical instruments
|
FR328597A
(en)
|
|
Phonograph
|
ES35658A1
(en)
|
|
Phonograph improvements.
|
FR360154A
(en)
|
|
English keys
|
CH37241A
(en)
|
|
Sound bodies on pianos
|