IPC Subgroup
H04R 11/02 Loudspeakers
Introduced: September 1968
Last revised: January 2006
Full Title
Transducers of moving-armature or moving-core type > Loudspeakers
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
Scope Notes
Limiting references: Telephone receivers of the moving-armature or moving-core type