IPC Main Group
H04N 5/00 Details of television systems
Introduced: September 1968
Last revised: January 2011
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- PICTORIAL COMMUNICATION, e.g. TELEVISION
Additional Content
Glossary
KTC Thermal noise on capacitor
Limiting references
Scanning details of television systems; Combination thereof with generation of supply voltages
Application references
Details of colour television systems Details of stereoscopic television systems Servers specifically adapted for the selective distribution of content Client devices specifically adapted for the reception of, or interaction with, content in selective content distribution
12 direct subcodes
Child Classifications
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- H04N 5/04 Synchronising
- H04N 5/14 Picture signal circuitry for video frequency region
- H04N 5/222 Studio circuitry; Studio devices; Studio equipment
- H04N 5/3 Transforming light or analogous information into electric information
- H04N 5/38 Transmitter circuitry
- H04N 5/44 Receiver circuitry
- H04N 5/63 Generation or supply of power specially adapted for television receivers
- H04N 5/64 Constructional details of receivers, e.g. cabinets or dust covers
- H04N 5/66 Transforming electric information into light information
- H04N 5/72 Modifying the appearance of television pictures by optical filters or diffusing screens
- H04N 5/74 Projection arrangements for image reproduction, e.g. using eidophor
- H04N 5/76 Television signal 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