Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
H04L 49/90

Buffering arrangements

Introduced: January 2022

Full Title

Packet switching elements > Buffering arrangements

CPC subdivides this area 2x more granularly than IPC with 7 additional codes.

7 codes are CPC-only extensions.

IPC defines codes here since 2022.

Child Classifications

Navigate with arrow keys, Enter to open

  • H04L 49/9005 using dynamic buffer space allocation since 2022 IPC+CPC Available in IPC and CPC
  • H04L 49/901 using storage descriptor, e.g. read or write pointers since 2022 IPC+CPC Available in IPC and CPC
  • H04L 49/9015 for supporting a linked list since 2022 IPC+CPC Available in IPC and CPC
  • H04L 49/9021 CPC only CPC only
  • H04L 49/9023 for implementing a jitter-buffer since 2022 IPC+CPC Available in IPC and CPC
  • H04L 49/9026 CPC only CPC only
  • H04L 49/9031 CPC only CPC only
  • H04L 49/9036 CPC only CPC only
  • H04L 49/9042 CPC only CPC only
  • H04L 49/9057 Arrangements for supporting packet reassembly or resequencing since 2022 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