US PATENT SUBCLASS 84 / 397
.~.~.~ Drainage

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
330  DF  .~ Wind {5}
387 R  DF  .~.~ Brasses {7}
397.~.~.~ Drainage

DEFINITION

Classification: 84/397

Water-keys and analogous devices.