CPC Subgroup
H04L 25/20 Repeater circuits; Relay circuits
Full Title
Baseband systems > Details > Repeater circuits; Relay circuits
6 direct subcodes
Child Classifications
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- H04L 25/22 Repeaters for converting two wires to four wires; Repeaters for converting single current to double current
- H04L 25/24 Relay circuits using discharge tubes or semiconductor devices
- H04L 25/26 Circuits with optical sensing means
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