CPC Subgroup
H04B 10/25 Arrangements specific to fibre transmission
Full Title
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication > Arrangements specific to fibre transmission
5 direct subcodes
Child Classifications
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- H04B 10/2507 for the reduction or elimination of distortion or dispersion
- H04B 10/2575 Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B 10/2581 Multimode transmission
- H04B 10/2587 using a single light source for multiple stations
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