H04L 12/00 Data switching networks (interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units G06F13/00)
Introduced: January 1990
Title
Titles differ between systems:
IPC: Data switching networks
CPC: Data switching networks (interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units G06F13/00)
Full Title
Full titles differ between systems:
Data switching networks
Data switching networks (interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units G06F13/00)
Additional Content IPC
Glossary
Circuit switching A system in which a communication path is physically permanent during the communication. Packet switching A system in which information is divided into discrete data units, characterised by a data payload and an address part known as a header part. The data units are able to travel over different communication paths to the destination. Message switching systems A system in which a message is sent into a network with the address of its destination added and it is routed to its destination through the network, e.g. electronic mail network systems. Hybrid switching Combinations of different switching systems (e.g. packet switching systems and circuit switching systems). Gateway gateways Arrangements for connecting between networks having different types of switching systems.
Limiting references
Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units Interprocessor communication using networks
IPC and CPC are identically structured here. All 6 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1990.
Child Classifications
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- H04L 12/28 characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] (wireless communication networks H04W ) since 1990 +4 CPC IPC+CPC Available in IPC and CPC
- H04L 12/50 Circuit switching systems, i.e. systems in which the path is physically permanent during the communication since 1990 IPC+CPC Available in IPC and CPC
- H04L 12/54 Store-and-forward switching systems (packet switching systems H04L45/00, H04L47/00) since 1990 +1 CPC IPC+CPC Available in IPC and CPC
- H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways since 1990 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
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