US PATENT SUBCLASS 84 / 266
.~.~.~ Erard action

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
173  DF  .~ Stringed {10}
264  DF  .~.~ Harps {2}
266.~.~.~ Erard action

DEFINITION

Classification: 84/266

Patents for improvements in the mechanism by which the pitch of the strings is changed one or two semitones.