US PATENT SUBCLASS 84 / 442
.~.~ Key selectors

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
*  DD  .~ General features {7}
442.~.~ Key selectors

DEFINITION

Classification: 84/442

Means for selecting out of the twelve keys of an octave those needed for any diatomic scale.