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PCE
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CPC Main Group Additional Only
H04R 2400/00

Loudspeakers

5 direct subcodes

Child Classifications

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  • H04R 2400/01 Transducers used as a loudspeaker to generate sound aswell as a microphone to detect sound
  • H04R 2400/03 Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
  • H04R 2400/07 Suspension between moving magnetic core and housing
  • H04R 2400/11 Aspects regarding the frame of loudspeaker transducers
  • H04R 2400/13 Use or details of compression drivers

Top Applicants

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

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