CPC Subgroup Additional Only
H04B 2210/25 Distortion or dispersion compensation
Full Title
Indexing scheme relating to optical transmission systems > Distortion or dispersion compensation
4 direct subcodes
Child Classifications
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- H04B 2210/252 after the transmission line, i.e. post-compensation
- H04B 2210/254 before the transmission line, i.e. pre-compensation
- H04B 2210/256 at the repeater, i.e. repeater compensation
- H04B 2210/258 treating each wavelength or wavelength band separately
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