US PATENT SUBCLASS 381 / FOR 123
ACOUSTICAL NOISE OR SOUND CANCELLATION (381/71)
Current as of:
June, 1999
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381 /
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ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES
FOR 123
ACOUSTICAL NOISE OR SOUND CANCELLATION (381/71)
DEFINITION
Classification: 381/FOR.123
ACOUSTICAL NOISE OR SOUND CANCELLATION
Foreign art collections including subject matter where audible noise is at least partially eliminated by generating an out-of-phase replica of the offending sound.
