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IPC Subgroup
H03C 3/1

by means of variable impedance

Introduced: September 1968

Last revised: January 2006

Full Title

Angle modulation > by means of variable impedance

Classification Context

Section:
ELECTRICITY
Class:
ELECTRONIC CIRCUITRY
Subclass:
MODULATION

Filing statistics

IPC H03C 3/1 belongs to the parent subclass H03C, which recorded 1,283 patent applications worldwide between 2013 and 2023. Annual filings declined from 191 in 2013 to 71 in 2023 (-63%). 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

Additional Content

Angle modulation by means of transit-time tube Angle modulation the tube being a magnetron Angle modulation by deflection of electron beam in discharge tube Angle modulation by means of light-sensitive element Conversion of amplitude to angle modulation

3 direct subcodes

Child Classifications

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  • H03C 3/28 using variable impedance driven mechanically or acoustically

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