CPC Main Group Additional Only
H04R 2440/00 Bending wave transducers covered by H04R, not provided for in its groups
4 direct subcodes
Child Classifications
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- H04R 2440/01 Acoustic transducers using travelling bending waves to generate or detect sound
- H04R 2440/03 Resonant bending wave transducer used as a microphone
- H04R 2440/05 Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels
- H04R 2440/07 Loudspeakers using bending wave resonance and pistonic motion to generate sound
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