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CPC Subgroup
H04N 9/27

with variable depth of penetration of electron beam into the luminescent layer, e.g. penetrons

Full Title

Details of colour television systems > Picture reproducers (H04N9/11 takes precedence) > using cathode ray tubes (H04N9/11 takes precedence) > with variable depth of penetration of electron beam into the luminescent layer, e.g. penetrons

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