CPC Subgroup
H04B 10/2507 for the reduction or elimination of distortion or dispersion
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 > for the reduction or elimination of distortion or dispersion
7 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H04B 10/2513 due to chromatic dispersion
- H04B 10/2537 due to scattering processes, e.g. Raman or Brillouin scattering
- H04B 10/2543 due to fibre non-linearities, e.g. Kerr effect
- H04B 10/2569 due to polarisation mode dispersion [PMD]
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