US PATENT SUBCLASS 84 / 346
.~.~.~ Swells

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
330  DF  .~ Wind {5}
331  DF  .~.~ Pipe organs {4}
346.~.~.~ Swells {1}
347  DF  .~.~.~.~> Electropneumatic

DEFINITION

Classification: 84/346

Patents relating to swell-shutters and means for operating them.