US PATENT SUBCLASS 84 / 440
.~.~.~.~ Resistance

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}
439  DF  .~.~.~ Touch regulators {1}
440.~.~.~.~ Resistance

DEFINITION

Classification: 84/440

Means to adjust the resistance of the keys.