US PATENT SUBCLASS 381 / 184
.~.~ Different types of diaphragms

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}
182  DF  .~ Plural or compound reproducers {4}
184.~.~ Different types of diaphragms

DEFINITION

Classification: 381/184

Different types of diaphragms:

(under subclass 182) Subject matter having two or more flexible membranes which differ in size, shape or

composition.