H04B TRANSMISSION
Description
H04B covers the technical systems and methods for transmitting signals, data, and information through various communication media and channels. This subclass encompasses transmission techniques across multiple frequency ranges, including radio transmission, wire-based transmission, optical transmission, and hybrid systems. It includes aspects such as signal modulation, amplification, filtering, impedance matching, and transmission line design, as well as technologies for managing bandwidth, noise, and signal quality. Adjacent classes address reception techniques (H04B15), specific communication protocols and applications (H04L-H04W), and individual component design.
14 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H04B 1/00 Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B 10/00 Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B 11/00 Transmission systems employing ultrasonic, sonic or infrasonic waves
- H04B 13/00 Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B 14/00 Transmission systems not characterised by the medium used for transmission (details thereof H04B1/00)
- H04B 15/00 Suppression or limitation of noise or interference (by means associated with receiver H04B1/10)
- H04B 17/00 Monitoring; Testing (of line transmission systems H04B3/46; arrangements for monitoring or testing transmission systems employing electromagnetic waves other than radio waves H04B10/07)
- H04B 2201/00 Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B 2203/00 Indexing scheme relating to line transmission systems
- H04B 2210/00 Indexing scheme relating to optical transmission systems
- H04B 2215/00 Reducing interference at the transmission system level
- H04B 3/00 Line transmission systems (combined with near-field transmission systems H04B5/00)
- H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B 7/00 Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence)
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