H04L 7/02 Speed or phase control by the received code signals, the signals containing no special synchronisation information
Introduced: September 1968
Last revised: January 2006
Full Title
Arrangements for synchronising receiver with transmitter > Speed or phase control by the received code signals, the signals containing no special synchronisation information
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
Filing statistics
IPC H04L 7/02 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
2 direct subcodes
Child Classifications
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- H04L 7/027 extracting the synchronising or clock signal from the received signal spectrum, e.g. by using a resonant or bandpass circuit
- H04L 7/033 using the transitions of the received signal to control the phase of the synchronising-signal- generating means, e.g. using a phase-locked loop
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