Electric stringed instrument having a device for sustaining...

Electric stringed instrument having a device for sustaining...

Electrical control devices

Electrical key switch

Electrical music apparatus capable of connection with...

Electrical musical instrument

Electrical musical instrument

Electrical musical instrument

Electrical musical instrument phase shift vibrato system

Electrical simulation of percussive bell

Electro-acoustic musical instrument

Electro-acoustic signalling horns

Electro-acoustic sound diffuser

Electro-acoustic system

Electro-acoustical apparatus

Electro-acoustical apparatus

Electro-acoustical system

Electro-acoustically amplified drum

Electro-mechanical keyboard memory for an electronic musical...

Electroacoustic calling device