IPC Main Group
H04B 7/00 Radio transmission systems, i.e. using radiation field
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TRANSMISSION
Additional Content
Near-field transmission systems, e.g. inductive or capacitive transmission systems Transmission systems employing beams of corpuscular radiation, or electromagnetic waves other than radio waves, e.g. light, infra-red Suppression or limitation of noise or interference
7 direct subcodes
Child Classifications
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- H04B 7/005 Control of transmission; Equalising
- H04B 7/01 Reducing phase shift
- H04B 7/015 Reducing echo effects
- H04B 7/02 Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas
- H04B 7/14 Relay systems
- H04B 7/22 Scatter propagation systems
- H04B 7/24 for communication between two or more posts
Top Applicants
Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 97,396
- HUAWEI TECHNOLOGIES COMPANY CN 96,502
- SAMSUNG ELECTRONICS COMPANY KR 86,981
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
- HUAWEI TECHNOLOGIES COMPANY 55,349
- LG ELECTRONICS KR 53,649
- CANON 33,341
- SONY CORPORATION JP 32,761
- ZTE CORPORATION CN 32,274
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327