H03K 17/56 by the use, as active elements, of semiconductor devices (using diodes H03K17/74)
Introduced: September 1968
Title
Titles differ between systems:
IPC: by the use, as active elements, of semiconductor devices
CPC: by the use, as active elements, of semiconductor devices (using diodes H03K17/74)
Full Title
Full titles differ between systems:
Electronic switching or gating, i.e. not by contact-making and -breaking > characterised by the use of specified components > by the use, as active elements, of semiconductor devices
Electronic switching or gating, i.e. not by contact-making and –breaking (gated amplifiers H03F3/72; switching arrangements for exchange systems using static devices H04Q3/52) > characterised by the components used (H03K17/04 - H03K17/30, H03K17/94 take precedence) > by the use, as active elements, of semiconductor devices (using diodes H03K17/74)
IPC and CPC are identically structured here. All 6 subcodes exist in both systems.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H03K 17/567 Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT since 1995 IPC+CPC Available in IPC and CPC
- H03K 17/60 the devices being bipolar transistors (bipolar transistors having four or more electrodes H03K17/72) +3 CPC IPC+CPC Available in IPC and CPC
- H03K 17/687 the devices being field-effect transistors since 1980 +4 CPC −1 IPC IPC+CPC Available in IPC and CPC
- H03K 17/70 the devices having only two electrodes and exhibiting negative resistance (the devices being tunnel diodes H03K17/58) IPC+CPC Available in IPC and CPC
- H03K 17/72 having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class H03,2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 5,625
- SAMSUNG ELECTRONICS COMPANY KR 5,496
- MURATA MANUFACTURING COMPANY JP 5,478
- HUAWEI TECHNOLOGIES COMPANY CN 3,383
- INTEL CORPORATION US 3,091
- TEXAS INSTRUMENTS US 3,070
- MURATA MANUFACTURING COMPANY 2,722
- SKYWORKS SOLUTIONS US 2,290
- SEIKO EPSON CORPORATION 2,177
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,158
Top Applicants (CPC)
Class H03,2013–2023, worldwide · Source: EPO PATSTAT
- SAMSUNG ELECTRONICS COMPANY KR 7,293
- QUALCOMM US 7,085
- MURATA MANUFACTURING COMPANY JP 5,982
- HUAWEI TECHNOLOGIES COMPANY CN 4,641
- INTEL CORPORATION US 3,863
- TEXAS INSTRUMENTS US 3,409
- MURATA MANUFACTURING COMPANY 2,874
- SK HYNIX KR 2,644
- SKYWORKS SOLUTIONS US 2,545
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,437