IPC Main Group
H04R 7/00 Diaphragms for electromechanical transducers; Cones
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
Related Keywords
CONES for electromechanical transducersDIAPHRAGMS for electromechanical transducers
3 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open