the devices being bipolar transistors (bipolar transistors having four or more electrodes H03K17/72)

Introduced: September 1968

Title

Titles differ between systems:

IPC: the devices being bipolar transistors

CPC: the devices being bipolar transistors (bipolar transistors having four or more electrodes H03K17/72)

Full Title

Full titles differ between systems:

IPC:

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 > the devices being bipolar transistors

CPC:

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) > the devices being bipolar transistors (bipolar transistors having four or more electrodes H03K17/72)

Of 9 combined children, 6 exist in both systems.

3 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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H03K 17/601 CPC only CPC only
H03K 17/602 CPC only CPC only
H03K 17/603 CPC only CPC only
H03K 17/605 with galvanic isolation between the control circuit and the output circuit (H03K17/78 takes precedence) since 1990 IPC+CPC Available in IPC and CPC
H03K 17/615 in a Darlington configuration since 1990 IPC+CPC Available in IPC and CPC
H03K 17/62 Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors (logic circuits H03K19/00; code converters H03M5/00, H03M7/00) +7 CPC IPC+CPC Available in IPC and CPC
H03K 17/64 having inductive loads IPC+CPC Available in IPC and CPC
H03K 17/66 Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will +2 CPC IPC+CPC Available in IPC and CPC
H03K 17/68 specially adapted for switching AC currents or voltages 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