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 9/12 Picture reproducers
- H04N 9/43 Conversion of monochrome picture signals to colour picture signals for colour picture display
- H04N 9/44 Colour synchronisation
- H04N 9/64 Circuits for processing colour signals
- H04N 9/77 Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
- H04N 9/79 Processing of colour television signals in connection with recording
Top Applicants
Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 97,396
- HUAWEI TECHNOLOGIES COMPANY CN 96,502
- SAMSUNG ELECTRONICS COMPANY KR 86,981
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
- HUAWEI TECHNOLOGIES COMPANY 55,349
- LG ELECTRONICS KR 53,649
- CANON 33,341
- SONY CORPORATION JP 32,761
- ZTE CORPORATION CN 32,274
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327