US PATENT SUBCLASS 84 / 235
.~.~.~ Couplers

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
173  DF  .~ Stringed {10}
174  DF  .~.~ Pianos {19}
235.~.~.~ Couplers

DEFINITION

Classification: 84/235

Devices to operate two hammers from a single key.

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373, and 424.