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DK15762C
(en)
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Device for Keyboard Musical Instruments.
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AT68135B
(en)
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Electric keyboard musical instrument.
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|
DK15608C
(en)
|
|
Device for Acoustic Instruments.
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|
DK16067C
(en)
|
|
Device for Piano Repetition Mechanics.
|
|
FR418472A
(en)
|
|
Piano violin
|
|
ES53178A1
(en)
|
|
Provisions for stringed instruments.
|
|
GB191222884A
(en)
|
|
Improvements in Keyboard Musical Instruments.
|
|
DK15546C
(en)
|
|
Device at Resonance Boundaries for Grand Pianos.
|
|
FR439534A
(en)
|
|
Stringed musical instrument
|
|
ES49951A1
(en)
|
|
Improvements in devices for the mechanical operation of musical instruments.
|
|
DK14980C
(en)
|
|
Voice recorder for musical instruments.
|
|
CH59188A
(en)
|
|
Novel musical instrument
|
|
ES52984A1
(en)
|
|
Improvements in self-executing stringed musical instruments.
|
|
FR18052E
(en)
|
|
Pegs for stringed instruments
|
|
DK21028C
(en)
|
|
Support device for String Instruments.
|
|
DK18476C
(en)
|
|
Sheet music for automatic musical instruments.
|
|
GB191322648A
(en)
|
|
Novel Musical Instrument.
|
|
FR456892A
(en)
|
|
Piano Improvements
|
|
GB191203016A
(en)
|
|
Improvements in Key-board Musical Instruments.
|
|
FR19874E
(en)
|
|
Pneumatic device for automatic keyboard musical instruments
|
|
GB191111003A
(en)
|
|
An Improved Violin Piano.
|
|
GB191219861A
(en)
|
|
Improvements in Stringed Musical Instruments.
|
|
CH46853A
(en)
|
|
Keyboard for keyboard instruments
|
|
ES51376A1
(en)
|
|
Improvements in keyboard instruments.
|
|
FR444125A
(en)
|
|
Electro-mechanical musical instrument, which can be operated by hand or mechanically
|