H04M 1/66 with means for preventing unauthorised or fraudulent calling (verifying user identity or authority in secret or secure digital communications H04L9/32)
Introduced: September 1968
Title
Titles differ between systems:
IPC: with means for preventing unauthorised or fraudulent calling
CPC: with means for preventing unauthorised or fraudulent calling (verifying user identity or authority in secret or secure digital communications H04L9/32)
Full Title
Full titles differ between systems:
Substation equipment, e.g. for use by subscribers > with means for preventing unauthorised or fraudulent calling
Substation equipment, e.g. for use by subscribers (subscriber services or facilities provided at exchanges H04M3/00; prepayment telephone coin boxes H04M17/00; current supply arrangements H04M19/08) > with means for preventing unauthorised or fraudulent calling (verifying user identity or authority in secret or secure digital communications H04L9/32)
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 2000.
Child Classifications
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- H04M 1/663 Preventing unauthorised calls to a telephone set since 2000 IPC+CPC Available in IPC and CPC
- H04M 1/667 Preventing unauthorised calls from a telephone set (H04M1/677 takes precedence) since 2000 IPC+CPC Available in IPC and CPC
- H04M 1/677 Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers since 2000 +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