H04Q SELECTING
Introduced: September 1968
Last revised: January 2009
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- SELECTING
Description
H04Q covers switching and routing mechanisms in telecommunications networks, including exchange systems, selectors, and call distribution equipment. This subclass encompasses technologies for establishing connections between communication devices, such as automatic telephone exchanges, crossbar switches, and electronic switching systems. It includes both the hardware components and operational principles used to direct signals through communication networks to their intended destinations. Related switching technologies for data networks and specialized routing systems are classified elsewhere in H04L or other relevant communication subclasses.
Additional Content
Glossary
Satellite satellites A kind of exchange the operation of which depends upon control signals received from a supervisory exchange. Subscriber subscribers General term for terminal equipment, e.g. telephone for public use. Substation substations Subscriber or monitoring equipment which may connect a single subscriber to a line without choice as to subscriber. Switching centres switching centre Include exchanges and satellites.
Limiting references
Electric switches; Relays; Selectors Multiplex communication Wireless communication networks
Related Keywords
5 direct subcodes
Child Classifications
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- H04Q 1/00 Details of selecting apparatus or arrangements
- H04Q 11/00 Selecting arrangements for multiplex systems
- H04Q 3/00 Selecting arrangements
- H04Q 5/00 Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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