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CPC Subgroup
H04Q 3/04

Circuit arrangements for receivers of routing digits

Full Title

Selecting arrangements (H04Q5/00 - H04Q11/00 take precedence) > Circuit arrangements for receivers of routing digits

6 direct subcodes

Child Classifications

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  • H04Q 3/06 for group or trunk group selectors
  • H04Q 3/08 for local or long-distance selectors
  • H04Q 3/10 for PBX selectors, i.e. private branch exchange selectors
  • H04Q 3/12 for line selectors providing transfer of routing digits
  • H04Q 3/14 for two-way operation selectors
  • H04Q 3/16 for marking-switches

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