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CPC Main Group
H04Q 9/00

Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Filing statistics

CPC H04Q 9/00 belongs to the parent subclass H04Q, which recorded 55,205 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,939 in 2013 to 5,112 in 2023 (+30%), peaking at 6,044 applications in 2021. 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

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  • H04Q 9/02 Automatically-operated arrangements
  • H04Q 9/04 Arrangements for synchronous operation
  • H04Q 9/06 Calling by using amplitude or polarity of DC

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