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IPC Main Group
H04N 9/00

Details of colour television systems

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
PICTORIAL COMMUNICATION, e.g. TELEVISION

Additional Content

Details of stereoscopic colour television systems

9 direct subcodes

Child Classifications

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  • H04N 9/01 Circuitry for demodulating colour component signals modulated spatially by colour striped filters by phase separation
  • H04N 9/03 Circuitry for demodulating colour component signals modulated spatially by colour striped filters by frequency separation
  • H04N 9/11 Scanning of colour motion picture films, e.g. for telecine
  • H04N 9/43 Conversion of monochrome picture signals to colour picture signals for colour picture display

Top Applicants

Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. QUALCOMM US 97,396
  2. HUAWEI TECHNOLOGIES COMPANY CN 96,502
  3. SAMSUNG ELECTRONICS COMPANY KR 86,981
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
  5. HUAWEI TECHNOLOGIES COMPANY 55,349
  6. LG ELECTRONICS KR 53,649
  7. CANON 33,341
  8. SONY CORPORATION JP 32,761
  9. ZTE CORPORATION CN 32,274
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327