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IPC Subgroup
H04L 49/1

characterised by the switching fabric construction

Introduced: January 2022

Full Title

Packet switching elements > characterised by the switching fabric construction

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION

8 direct subcodes

Child Classifications

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  • H04L 49/101 using crossbar or matrix
  • H04L 49/102 using shared medium, e.g. bus or ring
  • H04L 49/103 using a shared central buffer; using a shared memory
  • H04L 49/104 Asynchronous transfer mode [ATM] switching fabrics
  • H04L 49/109 Integrated on microchip, e.g. switch-on-chip
  • H04L 49/111 Switch interfaces, e.g. port details
  • H04L 49/112 Switch control, e.g. arbitration

Top Applicants

Top 10 applicants by patent filingsfor 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