CPC Subgroup
H04L 25/02 Details
Full Title
Baseband systems > Details
12 direct subcodes
Child Classifications
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- H04L 25/03 Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L 25/05 Electric or magnetic storage of signals before transmitting or retransmitting for changing the transmission rate
- H04L 25/06 DC level restoring means; Bias distortion correction
- H04L 25/08 Modifications for reducing interference; Modifications for reducing effects due to line faults
- H04L 25/10 Compensating for variations in line balance
- H04L 25/12 Compensating for variations in line impedance
- H04L 25/14 Channel dividing arrangements
- H04L 25/20 Repeater circuits; Relay circuits
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