CPC Main Group
H04R 19/00 Electrostatic transducers
5 direct subcodes
Child Classifications
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- H04R 19/01 characterised by the use of electrets
- H04R 19/02 Loudspeakers (H04R19/01 takes precedence)
- H04R 19/04 Microphones (H04R19/01 takes precedence)
- H04R 19/06 Gramophone pick-ups using a stylus; Recorders using a stylus (H04R19/01 takes precedence)