US1856730A
|
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Plano loud speaker
|
US1838328A
|
|
Automatic musical instrument
|
US1836077A
|
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Electromagnet valve device
|
US1797741A
|
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Automatic action for player pianos
|
US1808808A
|
|
Music roll magazine
|
GB317548A
|
|
Improvements in or relating to music indicators for keyboard musical instruments
|
US1670915A
|
|
Bearing
|
US1782061A
|
|
Expression device for automatic pianos
|
US1749403A
|
|
Pedal means for automatic pianos and the like
|
US1750988A
|
|
Musical apparatus
|
US1708643A
|
|
Instruction device for musical instruments
|
US1733477A
|
|
Instruction device for musical instruments
|
US1728191A
|
|
Instruction device for musical instruments
|
US1681373A
|
|
Combination stop action for organs
|
US1677908A
|
|
Pitman for pneumatic motors
|
US1727144A
|
|
Organ
|
US1753148A
|
|
Perforating machine and the like
|
US1704078A
|
|
Expression regulator for player pianos
|
US1581086A
|
|
Phonograph and radioadapter
|
US1704077A
|
|
Player action
|