DK31647C
(en )
1923-04-30
Musical instrument with keys and several keyboards.
FR527934A
(en )
1921-11-03
Improvement in stringed musical instruments
FR583335A
(en )
1925-01-10
Hinged key
FR31804E
(en )
1927-06-13
Musical instrument, saxophone genre, with slider
GR52B
(en )
1921-04-21
MUSICAL INSTRUMENT FACTOR THROUGH ITS FEW KEYS, MANY MUSICAL SOUNDS.
GR237B
(en )
1922-01-15
MUSICAL INSTRUMENT FACTOR THROUGH THE FEW KEYS OF MANY MUSICAL SOUNDS.
FR552738A
(en )
1923-05-05
Keyboard xylophone
FR508723A
(en )
1920-10-21
Keys
FR23089E
(en )
1921-10-04
Accompanying instrument (piano, organ or harmonium)
ES74580A1
(en )
1920-11-01
Improvements in musical instruments.
ES68828A1
(en )
1919-02-16
Device for operating any musical instrument with keys, particularly harmoniums and organs.
FR600226A
(en )
1926-02-02
Musical instrument, saxophone genre, with slider
FR546355A
(en )
1922-11-08
Piano keys hardener
DK37049C
(en )
1927-01-24
Playing device for Musical Instruments with Keyboard.
DK36350C
(en )
1926-08-09
Close to Piano and Grand Piano Keyboard.
DK31917C
(en )
1923-07-02
Musical instrument.
FR549867A
(en )
1923-02-21
English key
AT89507B
(en )
1922-09-25
String instrument.
ES75218A1
(en )
1920-12-16
A keyboard rubbing excited strings musical instrument.
ES82297A1
(en )
1923-01-16
Guitar and lute.
GR1112B
(en )
1926-01-30
LIGHTING DEVICE IN MUSICAL INSTRUMENTS BY KEYS (LOCKS).
FR589847A
(en )
1925-06-05
English key
ES83309A3
(en )
1923-04-01
Improvements in mechanical music instruments.
DK35533C
(en )
1926-01-25
Tone refinement steps for Pianos and Grand Pianos.
FR576607A
(en )
1924-08-23
Improvement in English keys