Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
CPC Main Group Additional Only
H04R 2227/00

Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups

Filing statistics

CPC H04R 2227/00 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

5 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • H04R 2227/001 Adaptation of signal processing in PA systems in dependence of presence of noise
  • H04R 2227/003 Digital PA systems using, e.g. LAN or internet
  • H04R 2227/005 Audio distribution systems for home, i.e. multi-room use
  • H04R 2227/007 Electronic adaptation of audio signals to reverberation of the listening space for PA
  • H04R 2227/009 Signal processing in [PA] systems to enhance the speech intelligibility

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