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CPC Subgroup
H04B 3/462

Testing group delay or phase shift, e.g. timing jitter

Full Title

Line transmission systems (combined with near-field transmission systems H04B5/00) > Details > Monitoring; Testing > Testing group delay or phase shift, e.g. timing jitter

1 direct subcode

Child Classifications

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  • H04B 3/466 Testing attenuation in combination with at least one of group delay and phase shift

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