US PATENT SUBCLASS 181 / 284
.~ Sound absorbing panels

Current as of: June, 1999
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181 /   HD   ACOUSTICS

175  DF  SOUND-MODIFYING MEANS {12}
284.~ Sound absorbing panels {8}
285  DF  .~.~> Load bearing block type structure
286  DF  .~.~> Specific acoustical properties or dimensions
287  DF  .~.~> Movable/foldable panels
288  DF  .~.~> Cellular
289  DF  .~.~> Light permeable
290  DF  .~.~> Multilayer panel or wall structure {2}
293  DF  .~.~> With channels or cavities in surface layer
294  DF  .~.~> Materials

DEFINITION

Classification: 181/284

Sound absorbing panels:

(under subclass 175) Subject matter comprising planar-type structure for attenuating acoustic waves.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings),

144+, for a combination of units having an exposed surface configuration having an acoustical function, or a unit with a feature for such a combination.

428, Stock Material or Miscellaneous Articles, for a product or stock material.