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CPC Main Group
H04J 1/00

Frequency-division multiplex systems (H04J14/00 takes precedence)

Filing statistics

CPC H04J 1/00 belongs to the parent subclass H04J, which recorded 67,722 patent applications worldwide between 2013 and 2023. Annual filings declined from 7,059 in 2013 to 4,065 in 2023 (-42%), peaking at 7,268 applications in 2018. 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

3 direct subcodes

Child Classifications

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  • H04J 1/18 in which all the carriers are amplitude-modulated (H04J1/02 takes precedence )
  • H04J 1/20 in which at least one carrier is angle-modulated (H04J1/02 takes precedence; FM without multiplex H04B1/00, H04B14/006, H04B15/00; PSK H04L5/12; impulse-modulation without multiplex H04B14/02; time-division multiplexing for data transmission H04L5/22; telemetry G08C15/06 - G08C15/12; telephony H04Q11/00, H04Q11/04, H04Q11/0407)

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