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IPC Main Group
H04L 7/00

Arrangements for synchronising receiver with transmitter

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION

Filing statistics

IPC H04L 7/00 belongs to the parent subclass H04L, which recorded 1,397,397 patent applications worldwide between 2013 and 2023. Annual filings grew from 91,584 in 2013 to 136,803 in 2023 (+49%), peaking at 147,432 applications in 2022. The most active applicants in class H04 are QUALCOMM (97,396 applications), HUAWEI TECHNOLOGIES COMPANY (96,502 applications) and SAMSUNG ELECTRONICS COMPANY (86,981 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Synchronising in computer bus systems Synchronisation arrangements specially adapted for spread spectrum techniques , , Synchronising in radio transmission systems Synchronising in radio relay systems, e.g. satellite networks Synchronising in radio transmission between mobile posts Arrangements for synchronising broadcast or distribution via plural distribution systems Synchronisation arrangements in time-division multiplex systems Synchronising in television systems for transmission of a pulse code modulated with a pulse code modulated synchronising signal Synchronisation processes in servers specifically adapted for selective pictorial content distribution, e.g. interactive television Content authoring involving timestamps for synchronising content, e.g. for the generation of multimedia applications Synchronising a decoder's clock in selective pictorial content distribution Synchronisation arrangements in wireless communication networks

2 direct subcodes

Child Classifications

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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