IPC Main Group
H04R 11/00 Transducers of moving-armature or moving-core type
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
5 direct subcodes
Child Classifications
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- H04R 11/02 Loudspeakers
- H04R 11/04 Microphones
- H04R 11/06 Telephone receivers
- H04R 11/08 Gramophone pick-ups using a stylus; Recorders using a stylus
- H04R 11/14 Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency