Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
H04N 7/167

Systems rendering the television signal unintelligible and subsequently intelligible

Introduced: January 1985

Last revised: January 2011

Full Title

Television systems > Analogue secrecy systems; Analogue subscription systems > Systems rendering the television signal unintelligible and subsequently intelligible

Classification Context

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

2 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • H04N 7/169 Systems operating in the time domain of the television signal
  • H04N 7/171 Systems operating in the amplitude domain of the television signal

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