DEVICE FOR GROUP TEACHING OF MUSIC Russian patent published in 1997 - IPC

Abstract RU 2090937 C1

FIELD: music. SUBSTANCE: specific feature of invention consists in that power supply line is low-voltage one and is one for commutation unit and electron musical instruments each made in the form of key instrument and is energized from one low-voltage supply source as minimum placed in one battery container of any of above-mentioned instruments. EFFECT: enhanced functional reliability and stability of device. 2 cl, 4 dwg

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RU 2 090 937 C1

Authors

Markelov A.V.

Dates

1997-09-20—Published

1994-01-17—Filed