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PCE
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DIFF Subgroup
H04B 1/69

Spread spectrum techniques

Introduced: January 1995

Full Title

Full titles differ between systems:

IPC:

Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission > Spread spectrum techniques

CPC:

Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission > Spread spectrum techniques

Additional Content IPC

RAKE A receiver comprising sub-receivers called fingers wherein each finger detects a single multipath component. The contributions of the fingers can be combined at a later stage.

Of 8 combined children, 4 exist in both systems.

4 codes are CPC-only extensions.

Note: 4 CPC extensions are marked as secondary classification only.

IPC defines codes here since 1995.

Child Classifications

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  • H04B 1/692 Hybrid techniques using combinations of two or more spread spectrum techniques since 2011 IPC+CPC Available in IPC and CPC
  • H04B 2001/6904 2nd only CPC only CPC only
  • H04B 2001/6908 2nd only CPC only CPC only
  • H04B 2001/6912 2nd only CPC only CPC only
  • H04B 2001/6916 2nd only CPC only CPC only

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