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PCE
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DIFF Subgroup
H04M 1/2745

using static electronic memories, e.g. chips

Introduced: January 2000

Full Title

Full titles differ between systems:

IPC:

Substation equipment, e.g. for use by subscribers > Devices for calling a subscriber > Devices whereby a plurality of signals may be stored simultaneously > with provision for storing more than one subscriber number at a time > using static electronic memories, e.g. chips

CPC:

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) > Devices for calling a subscriber (H04M1/66 takes precedence) > Devices whereby a plurality of signals may be stored simultaneously > with provision for storing more than one subscriber number at a time > using static electronic memories, e.g. chips

Of 8 combined children, 7 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2000.

Child Classifications

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  • H04M 1/27463 CPC only CPC only
  • H04M 1/27485 Appending a prefix to or inserting a pause into a dialling sequence since 2020 IPC+CPC Available in IPC and CPC
  • H04M 1/2749 Automatic dialling or redialling systems, e.g. on off-hook or redial on busy since 2020 IPC+CPC Available in IPC and CPC
  • H04M 1/27495 implemented by means of discrete electronic components, i.e. neither programmable nor microprocessor-controlled (H04M1/27457-H04M1/2749 take precedence) since 2020 IPC+CPC Available in IPC and CPC
  • H04M 1/275 implemented by means of portable electronic directories since 2000 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class H04,2013–2023, worldwide · Source: EPO PATSTAT

  1. QUALCOMM US 97,396
  2. HUAWEI TECHNOLOGIES COMPANY CN 96,502
  3. SAMSUNG ELECTRONICS COMPANY KR 86,981
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
  5. HUAWEI TECHNOLOGIES COMPANY 55,349
  6. LG ELECTRONICS KR 53,649
  7. CANON 33,341
  8. SONY CORPORATION JP 32,761
  9. ZTE CORPORATION CN 32,274
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327

Top Applicants (CPC)

Class H04,2013–2023, worldwide · Source: EPO PATSTAT

  1. HUAWEI TECHNOLOGIES COMPANY CN 101,476
  2. QUALCOMM US 101,139
  3. SAMSUNG ELECTRONICS COMPANY KR 96,655
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
  5. LG ELECTRONICS KR 55,253
  6. HUAWEI TECHNOLOGIES COMPANY 54,181
  7. SONY CORPORATION JP 35,309
  8. ZTE CORPORATION CN 32,950
  9. INTEL CORPORATION US 27,533
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498