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PCE
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DIFF Subgroup
H03D 1/14

by means of non-linear elements having more than two poles (H03D1/22, H03D1/26, H03D1/28 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: by means of non-linear elements having more than two poles

CPC: by means of non-linear elements having more than two poles (H03D1/22, H03D1/26, H03D1/28 take precedence)

Full Title

Full titles differ between systems:

IPC:

Demodulation of amplitude-modulated oscillations > by means of non-linear elements having more than two poles

CPC:

Demodulation of amplitude-modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence) > by means of non-linear elements having more than two poles (H03D1/22, H03D1/26, H03D1/28 take precedence)

Additional Content IPC

Homodyne or synchrodyne circuits Demodulation of amplitude-modulated oscillations by means of transit-time tubes Demodulation of amplitude-modulated oscillations by deflecting an electron beam in a discharge tube

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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  • H03D 1/16 of discharge tubes IPC+CPC Available in IPC and CPC
  • H03D 1/18 of semiconductor devices IPC+CPC Available in IPC and CPC
  • H03D 1/20 with provision for preventing undesired type of demodulation, e.g. preventing anode detection in a grid detection circuit 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