Piezoelectric transducers; Electrostrictive transducers

Introduced: September 1968

Last revised: January 2006

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

Filing statistics

IPC H04R 17/00 belongs to the parent subclass H04R, which recorded 244,714 patent applications worldwide between 2013 and 2023. Annual filings grew from 13,395 in 2013 to 22,792 in 2023 (+70%), peaking at 30,255 applications in 2020. The most active applicants in class H04 are QUALCOMM (97,396 applications), HUAWEI TECHNOLOGIES COMPANY (96,502 applications) and SAMSUNG ELECTRONICS COMPANY (86,981 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

CRYSTALS used as transducerstransducers using ELECTROSTRICTIONtransducers using PIEZO-ELECTRICITY

3 direct subcodes

Child Classifications

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H04R 17/02 Microphones
H04R 17/04 Gramophone pick-ups using a stylus; Recorders using a stylus
H04R 17/1 Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency

Top Applicants

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

QUALCOMM US 97,396
HUAWEI TECHNOLOGIES COMPANY CN 96,502
SAMSUNG ELECTRONICS COMPANY KR 86,981
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
HUAWEI TECHNOLOGIES COMPANY 55,349
LG ELECTRONICS KR 53,649
CANON 33,341
SONY CORPORATION JP 32,761
ZTE CORPORATION CN 32,274
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327