US PATENT SUBCLASS 84 / 356
.~.~.~.~ Pressure and exhaust

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
330  DF  .~ Wind {5}
351  DF  .~.~ Reed organs {10}
355  DF  .~.~.~ Wind-supply devices {3}
356.~.~.~.~ Pressure and exhaust

DEFINITION

Classification: 84/356

Instruments involving both exhaust and pressure mechanisms.