Bus networks

Introduced: January 1990

Full Title

Full titles differ between systems:

IPC:

Data switching networks > characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] > Bus 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) > characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] (wireless communication networks H04W ) > Bus networks

CPC subdivides this area 5x more granularly than IPC with 8 additional codes.

8 codes are CPC-only extensions.

Note: 3 CPC extensions are marked as secondary classification only.

IPC defines codes here since 1995.

Child Classifications

Navigate with arrow keys, Enter to open

H04L 12/40006 +6 CPC CPC only CPC only
H04L 12/40052 +10 CPC CPC only CPC only
H04L 12/4013 +1 CPC CPC only CPC only
H04L 12/40143 +3 CPC CPC only CPC only
H04L 12/40169 +1 CPC CPC only CPC only
H04L 12/403 with centralised control, e.g. polling since 1995 +1 CPC IPC+CPC Available in IPC and CPC
H04L 12/407 with decentralised control since 1995 IPC+CPC Available in IPC and CPC
H04L 2012/40208 2nd only +7 CPC CPC only CPC only
H04L 2012/4026 2nd only CPC only CPC only
H04L 2012/40267 2nd only +4 CPC CPC only CPC only

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