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IPC Subgroup
H03J 1/18

Control by auxiliary power

Introduced: September 1968

Last revised: January 2006

Full Title

Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general > Control by auxiliary power

Classification Context

Section:
ELECTRICITY
Class:
ELECTRONIC CIRCUITRY
Subclass:
TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS

Filing statistics

IPC H03J 1/18 belongs to the parent subclass H03J, which recorded 1,256 patent applications worldwide between 2013 and 2023. Annual filings declined from 190 in 2013 to 41 in 2023 (-78%). The most active applicants in class H03 are QUALCOMM (5,625 applications), SAMSUNG ELECTRONICS COMPANY (5,496 applications) and MURATA MANUFACTURING COMPANY (5,478 applications).

Source: EPO PATSTAT, worldwide filings

2 direct subcodes

Child Classifications

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  • H03J 1/2 the auxiliary power being switched on as long as controlling current is switched on
  • H03J 1/22 with stepping arrangements actuated by control pulses

Top Applicants

Top 10 applicants by patent filingsfor class H03, 2013–2023, worldwide · Source: EPO PATSTAT

  1. QUALCOMM US 5,625
  2. SAMSUNG ELECTRONICS COMPANY KR 5,496
  3. MURATA MANUFACTURING COMPANY JP 5,478
  4. HUAWEI TECHNOLOGIES COMPANY CN 3,383
  5. INTEL CORPORATION US 3,091
  6. TEXAS INSTRUMENTS US 3,070
  7. MURATA MANUFACTURING COMPANY 2,722
  8. SKYWORKS SOLUTIONS US 2,290
  9. SEIKO EPSON CORPORATION 2,177
  10. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,158