US PATENT SUBCLASS 84 / 294
.~.~.~ Resonance devices

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
173  DF  .~ Stringed {10}
290  DF  .~.~ Details {15}
294.~.~.~ Resonance devices {2}
295  DF  .~.~.~.~> Auxiliary strings
296  DF  .~.~.~.~> With diaphragm

DEFINITION

Classification: 84/294

Devices for changing the quality of tone of an instrument, as air-cavities, extra sounding-boards, sympathetically-vibrating parts, or small membranes.

(1) Note. For harmonic dampers see this class, subclass 234.