Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups

Filing statistics

CPC H04R 2209/00 belongs to the parent subclass H04R, which recorded 161,989 patent applications worldwide between 2013 and 2023. Annual filings grew from 9,314 in 2013 to 13,794 in 2023 (+48%), peaking at 18,978 applications in 2020. The most active applicants in class H04 are HUAWEI TECHNOLOGIES COMPANY (101,476 applications), QUALCOMM (101,139 applications) and SAMSUNG ELECTRONICS COMPANY (96,655 applications).

Source: EPO PATSTAT, worldwide filings

7 direct subcodes

Child Classifications

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H04R 2209/021 Reduction of eddy currents in the magnetic circuit of electrodynamic loudspeaker transducer
H04R 2209/022 Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils
H04R 2209/024 Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers
H04R 2209/026 Transducers having separately controllable opposing diaphragms, e.g. for ring-tone and voice (H04R2400/03 takes precedence)
H04R 2209/027 Electrical or mechanical reduction of yoke vibration
H04R 2209/041 Voice coil arrangements comprising more than one voice coil unit on the same bobbin
H04R 2209/043 Short circuited voice coils driven by induction

Top Applicants

Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT

HUAWEI TECHNOLOGIES COMPANY CN 101,476
QUALCOMM US 101,139
SAMSUNG ELECTRONICS COMPANY KR 96,655
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
LG ELECTRONICS KR 55,253
HUAWEI TECHNOLOGIES COMPANY 54,181
SONY CORPORATION JP 35,309
ZTE CORPORATION CN 32,950
INTEL CORPORATION US 27,533
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498