Centralised call answering arrangements requiring operator intervention

Introduced: January 2000

Full Title

Full titles differ between systems:

IPC:

Automatic or semi-automatic exchanges > Systems providing special services or facilities to subscribers > Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers > Centralised call answering arrangements requiring operator intervention

CPC:

Automatic or semi-automatic exchanges > Systems providing special services or facilities to subscribers (specially adapted for wireless communication networks H04W4/00) > Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers (H04M3/487 takes precedence; centralised dictation systems H04M11/10); > Centralised call answering arrangements requiring operator intervention

CPC subdivides this area 6x more granularly than IPC with 10 additional codes.

10 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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H04M 3/5108 CPC only CPC only
H04M 3/5116 CPC only CPC only
H04M 3/5125 CPC only CPC only
H04M 3/5133 CPC only CPC only
H04M 3/5141 CPC only CPC only
H04M 3/515 CPC only CPC only
H04M 3/5158 CPC only CPC only
H04M 3/5166 CPC only CPC only
H04M 3/5175 CPC only CPC only
H04M 3/5183 +1 CPC CPC only CPC only
H04M 3/52 Arrangements for routing dead number calls to operators IPC+CPC Available in IPC and CPC
H04M 3/523 with call distribution or queueing since 2000 +4 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