H04B 1/69 Spread spectrum techniques
Introduced: January 1995
Last revised: January 2011
Full Title
Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission > Spread spectrum techniques
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TRANSMISSION
Filing statistics
IPC H04B 1/69 belongs to the parent subclass H04B, which recorded 440,404 patent applications worldwide between 2013 and 2023. Annual filings grew from 35,964 in 2013 to 39,968 in 2023 (+11%), peaking at 45,523 applications in 2020. 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
RAKE A receiver comprising sub-receivers called fingers wherein each finger detects a single multipath component. The contributions of the fingers can be combined at a later stage.
Related Keywords
4 direct subcodes
Child Classifications
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- H04B 1/692 Hybrid techniques using combinations of two or more spread spectrum techniques
- H04B 1/707 using direct sequence modulation
- H04B 1/713 using frequency hopping
- H04B 1/7163 using impulse radio
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