US PATENT SUBCLASS 84 / 709
.~.~.~.~ Trill

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
600  DF  .~ Electrical musical tone generation {5}
671  DF  .~.~ Electric analog oscillators {9}
701  DF  .~.~.~ Expression or special effects {9}
709.~.~.~.~ Trill

DEFINITION

Classification: 84/709

Trill:

(under subclass 701) Subject matter wherein the rapid alternation of two tones either a whole or a half tone apart.