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CPC Subgroup
H04N 5/073

for mutually locking plural sources of synchronising signals, e.g. studios or relay stations

Full Title

Details of television systems (scanning details or combination thereof with generation of supply voltages H04N3/00) > Synchronising (for television systems using pulse code modulation H04N7/56) > Generation of synchronising signals > Arrangements or circuits at the transmitter end > for mutually locking plural sources of synchronising signals, e.g. studios or relay stations

2 direct subcodes

Child Classifications

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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