US PATENT SUBCLASS 381 / 433
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Current as of:
June, 1999
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381 /
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ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES
150
DF
ELECTRO-ACOUSTIC AUDIO TRANSDUCER
{18}
396
DF
.~ Electromagnetic (e.g., dyynamic) {8}
433
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DEFINITION
Classification: 381/433
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(under subclass 396) Subject matter specifying a frame-like structure which supports both a diaphragm and a magnetic circuit means.