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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