US PATENT SUBCLASS 381 / 177
.~.~ Dynamic (e.g., magnetic)

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}
369  DF  .~ Microphone capsule only {10}
177.~.~ Dynamic (e.g., magnetic)

DEFINITION

Classification: 381/177

Dynamic (e.g., magnetic):

(under subclass 168) Subject matter including a diaphragm to which a current conducting element is attached and which is positioned in a fixed magnetic field.