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PCE
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DIFF Subgroup
H03C 1/56

comprising variable two-pole elements only

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Amplitude modulation > Modulators in which carrier or one sideband is wholly or partially suppressed > Balanced modulators, e.g. bridge type, ring type or double balanced type > comprising variable two-pole elements only

CPC:

Amplitude modulation (H03C5/00, H03C7/00 take precedence) > Modulators in which carrier or one sideband is wholly or partially suppressed (H03C1/28 - H03C1/34, H03C1/46, H03C1/48 take precedence) > Balanced modulators, e.g. bridge type, ring type or double balanced type > comprising variable two-pole elements only

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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  • H03C 1/58 comprising diodes IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

Class H03,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 7,293
  2. QUALCOMM US 7,085
  3. MURATA MANUFACTURING COMPANY JP 5,982
  4. HUAWEI TECHNOLOGIES COMPANY CN 4,641
  5. INTEL CORPORATION US 3,863
  6. TEXAS INSTRUMENTS US 3,409
  7. MURATA MANUFACTURING COMPANY 2,874
  8. SK HYNIX KR 2,644
  9. SKYWORKS SOLUTIONS US 2,545
  10. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,437