CPC Subgroup
H04J 1/02 Details
Full Title
Frequency-division multiplex systems (H04J14/00 takes precedence) > Details
7 direct subcodes
Child Classifications
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- H04J 1/04 Frequency-transposition arrangements
- H04J 1/06 Arrangements for supplying the carrier waves
- H04J 1/08 Arrangements for combining channels
- H04J 1/10 Intermediate station arrangements, e.g. for branching, for tapping-off
- H04J 1/12 Arrangements for reducing cross-talk between channels
- H04J 1/14 Arrangements providing for calling or supervisory signals
- H04J 1/16 Monitoring arrangements
Top Applicants
Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT
- HUAWEI TECHNOLOGIES COMPANY CN 101,476
- QUALCOMM US 101,139
- SAMSUNG ELECTRONICS COMPANY KR 96,655
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
- LG ELECTRONICS KR 55,253
- HUAWEI TECHNOLOGIES COMPANY 54,181
- SONY CORPORATION JP 35,309
- ZTE CORPORATION CN 32,950
- INTEL CORPORATION US 27,533
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498