US PATENT SUBCLASS 84 / 446
.~.~.~ Auxiliary keyboard

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
*  DD  .~ General features {7}
445  DF  .~.~ Transposers {4}
446.~.~.~ Auxiliary keyboard

DEFINITION

Classification: 84/446

A shiftable keyboard superposed on the ordinary one.