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IPC Subgroup
H04K 1/1

by using two signals transmitted simultaneously or successively

Introduced: September 1968

Last revised: January 2006

Full Title

Secret communication > by using two signals transmitted simultaneously or successively

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
SECRET COMMUNICATION; JAMMING OF COMMUNICATION

Filing statistics

IPC H04K 1/1 belongs to the parent subclass H04K, which recorded 7,294 patent applications worldwide between 2013 and 2023. Annual filings grew from 553 in 2013 to 669 in 2023 (+21%), peaking at 834 applications in 2020. The most active applicants in class H04 are QUALCOMM (97,396 applications), HUAWEI TECHNOLOGIES COMPANY (96,502 applications) and SAMSUNG ELECTRONICS COMPANY (86,981 applications).

Source: EPO PATSTAT, worldwide filings

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