IPC Subgroup
H04N 7/16 Analogue secrecy systems; Analogue subscription systems
Introduced: September 1968
Last revised: January 2011
Full Title
Television systems > Analogue secrecy systems; Analogue subscription systems
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- PICTORIAL COMMUNICATION, e.g. TELEVISION
2 direct subcodes
Child Classifications
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- H04N 7/167 Systems rendering the television signal unintelligible and subsequently intelligible
- H04N 7/173 with two-way working, e.g. subscriber sending a programme selection signal
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