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IPC Subgroup
H04N 3/18

Generation of supply voltages, in combination with electron beam deflecting

Introduced: September 1968

Last revised: January 2006

Full Title

Scanning details of television systems; Combination thereof with generation of supply voltages > by means not exclusively optical-mechanical > by deflecting electron beam in cathode-ray tube > Generation of supply voltages, in combination with electron beam deflecting

Classification Context

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

2 direct subcodes

Child Classifications

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  • H04N 3/185 Maintaining DC voltage constant
  • H04N 3/19 Arrangements or assemblies in supply circuits for the purpose of withstanding high voltages

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