IPC Subgroup
H04R 19/08 comprising two or more styli or transducers
Introduced: September 1968
Last revised: January 2006
Full Title
Electrostatic transducers > Gramophone pick-ups using a stylus; Recorders using a stylus > comprising two or more styli or transducers
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