US PATENT SUBCLASS 84 / 220
.~.~.~.~.~ Curtain type

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
173  DF  .~ Stringed {10}
174  DF  .~.~ Pianos {19}
216  DF  .~.~.~ Expression devices {5}
219  DF  .~.~.~.~ Pianissimo devices {2}
220.~.~.~.~.~ Curtain type

DEFINITION

Classification: 84/220

A curtain is interposed between the hammer and the strings. Called in old patents "celeste".