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DIFF Main Group
H03C 1/00

Amplitude modulation (H03C5/00, H03C7/00 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Amplitude modulation

CPC: Amplitude modulation (H03C5/00, H03C7/00 take precedence)

Full Title

Full titles differ between systems:

IPC:

Amplitude modulation

CPC:

Amplitude modulation (H03C5/00, H03C7/00 take precedence)

Additional Content IPC

Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal Modulating electromagnetic waves

IPC and CPC are identically structured here. All 12 subcodes exist in both systems.

6 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • H03C 1/32 by deflection of electron beam in discharge tube IPC+CPC Available in IPC and CPC
  • H03C 1/34 by means of light-sensitive element IPC+CPC Available in IPC and CPC
  • H03C 1/36 by means of semiconductor device having at least three electrodes (H03C1/34, H03C1/50, H03C1/52, H03C1/62 take precedence) IPC+CPC Available in IPC and CPC
  • H03C 1/46 Modulators with mechanically-driven or acoustically-driven parts IPC+CPC Available in IPC and CPC
  • H03C 1/48 by means of Hall-effect devices IPC+CPC Available in IPC and CPC
  • H03C 1/50 by converting angle modulation to amplitude modulation (H03C1/28 - H03C1/34, H03C1/46, H03C1/48 take precedence) IPC+CPC Available in IPC and CPC
  • H03C 1/62 Modulators in which amplitude of carrier component in output is dependent upon strength of modulating signal, e.g. no carrier output when no modulating signal is present (H03C1/28 - H03C1/34, H03C1/46, H03C1/48 take precedence) 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