CPC Subgroup
H04N 9/16 using cathode ray tubes (H04N9/11 takes precedence)
Full Title
Details of colour television systems > Picture reproducers (H04N9/11 takes precedence) > using cathode ray tubes (H04N9/11 takes precedence)
5 direct subcodes
Child Classifications
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- H04N 9/18 using separate electron beams for the primary colour signals (H04N9/27 takes precedence)
- H04N 9/22 using the same beam for more than one primary colour information (H04N9/27 takes precedence)
- H04N 9/27 with variable depth of penetration of electron beam into the luminescent layer, e.g. penetrons
- H04N 9/28 Arrangements for convergence or focusing
- H04N 9/29 using demagnetisation or compensation of external magnetic fields
Top Applicants
Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT
- HUAWEI TECHNOLOGIES COMPANY CN 101,476
- QUALCOMM US 101,139
- SAMSUNG ELECTRONICS COMPANY KR 96,655
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
- LG ELECTRONICS KR 55,253
- HUAWEI TECHNOLOGIES COMPANY 54,181
- SONY CORPORATION JP 35,309
- ZTE CORPORATION CN 32,950
- INTEL CORPORATION US 27,533
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498