US PATENT SUBCLASS 381 / 92
DIRECTIVE CIRCUITS FOR MICROPHONES
Current as of:
June, 1999
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381 /
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ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES
92
DIRECTIVE CIRCUITS FOR MICROPHONES
DEFINITION
Classification: 381/92
DIRECTIVE CIRCUITS FOR MICROPHONES:
(under the class definition) Subject matter including a circuit for imparting directional pickup characteristics to microphones.
SEE OR SEARCH THIS CLASS, SUBCLASS:
155, for a directional microphone, per se.
