US PATENT SUBCLASS 84 / 433
.~.~.~ Keys

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
*  DD  .~ General features {7}
423 R  DF  .~.~ Keyboards {12}
433.~.~.~ Keys {4}
434  DF  .~.~.~.~> Fulcrums and guides
435  DF  .~.~.~.~> Fulcrums
436  DF  .~.~.~.~> Guides
437  DF  .~.~.~.~> Plating

DEFINITION

Classification: 84/433

The improvement can be embodied in a single key.