IPC Subgroup
H04B 1/403 using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
Introduced: January 2015
Full Title
Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission > Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving > Circuits > using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TRANSMISSION
2 direct subcodes
Child Classifications
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- H04B 1/405 with multiple discrete channels
- H04B 1/408 the transmitter oscillator frequency being identical to the receiver local oscillator frequency
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