US PATENT SUBCLASS 381 / 152
.~ Driven diverse static structure (e.g., wall, sounding board)

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

150  DF  ELECTRO-ACOUSTIC AUDIO TRANSDUCER {18}
152.~ Driven diverse static structure (e.g., wall, sounding board)

DEFINITION

Classification: 381/152

Driven diverse static structure (e.g., wall, sounding board):

(under subclass 150) Subject matter combined with a stationary structural element having a function independent of electricity-to-sound conversion and being driven to radiate sound waves by an audio transducer mounted thereon.

(1) Note. Devices which vibrate walls to emit intelligible sound are classified herein.