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Patent Classification Explorer PCE

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Search for IPC and CPC classification codes or keywords

H
H04
H04R
H04R 19/00
H04R 19/04

CPC Subgroup

H04R 19/04

Microphones (H04R19/01 takes precedence)

Full Title

Electrostatic transducers > Microphones (H04R19/01 takes precedence)

CPC H04R 19/04

IPC Equivalent: H04R 19/04

1 CPC-only subgroup

H04R 19/02 H04R 19/06

Data: WIPO (IPC), EPO/USPTO (CPC) — CC BY 4.0

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