CPC Main Group
H04R 11/00 Transducers of moving-armature or moving-core type (acoustic diaphragm of magnetisable material directly coacting with electromagnet H04R13/00)
5 direct subcodes
Child Classifications
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- H04R 11/02 Loudspeakers
- H04R 11/04 Microphones
- H04R 11/06 Telephone receivers
- H04R 11/08 Gramophone pick-ups using a stylus; Recorders using a stylus
- H04R 11/14 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
- 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