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DIFF Subgroup
H03F 3/191

Tuned amplifiers (H03F3/193, H03F3/195 take precedence)

Introduced: July 1974

Title

Titles differ between systems:

IPC: Tuned amplifiers

CPC: Tuned amplifiers (H03F3/193, H03F3/195 take precedence)

Full Title

Full titles differ between systems:

IPC:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > High-frequency amplifiers, e.g. radio frequency amplifiers > with semiconductor devices only > Tuned amplifiers

CPC:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > High-frequency amplifiers, e.g. radio frequency amplifiers > with semiconductor devices only > Tuned amplifiers (H03F3/193, H03F3/195 take precedence)

No child classifications to compare. This is a leaf node in both 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