US PATENT SUBCLASS 381 / 369
.~ Microphone capsule only

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.~ Microphone capsule only {10}
170  DF  .~.~> Compound
171  DF  .~.~> Micromagnetic
172  DF  .~.~> Light modifying
173  DF  .~.~> Piezoelectric or ferroelectric
174  DF  .~.~> Capacitive
175  DF  .~.~> Semiconductor junction microphone
176  DF  .~.~> Conductive diaphragm (e.g., reed, ribbon)
177  DF  .~.~> Dynamic (e.g., magnetic)
178  DF  .~.~> Vibrating electrical contract
179  DF  .~.~> Resistive {1}

DEFINITION

Classification: 381/369

Microphone capsule only:

(under subclass 150) Subject matter for converting a sound wave into a corresponding time variation of an electrical signal, in which the claimed subject matter consists essentially of a diaphragm and motor means to convert sound-induced movement of the diaphragm into an electrical signal, and any minimal chassis or housing components necessary to hold the diaphragm and motor means together or in proper relative position.

(1) Note. This basic combination is sometimes referred to as a "capsule", or a "cartridge", or a "button". This is essentially the "smallest" combination of elements which can be said to comprise a transducer.