DIFF Subgroup
H04J 3/02 Details (electronic switching or gating H03K17/00)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Details
CPC: Details (electronic switching or gating H03K17/00)
Full Title
Full titles differ between systems:
IPC:
Time-division multiplex systems > Details
CPC:
Time-division multiplex systems (H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q) > Details (electronic switching or gating H03K17/00)
Of 7 combined children, 6 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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- H04J 3/04 Distributors combined with modulators or demodulators +3 CPC IPC+CPC Available in IPC and CPC
- H04J 3/08 Intermediate station arrangements, e.g. for branching, for tapping-off +1 CPC IPC+CPC Available in IPC and CPC
- H04J 3/12 Arrangements providing for calling or supervisory signals +1 CPC 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