IPC Subgroup
H04R 7/26 Damping by means acting directly on free portion of diaphragm or cone
Introduced: September 1968
Last revised: January 2006
Full Title
Diaphragms for electromechanical transducers; Cones > Damping by means acting directly on free portion of diaphragm or cone
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