using field-effect transistors

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits > using specified components > using semiconductor devices > using field-effect transistors

CPC:

Logic circuits, i.e. having at least two inputs acting on one output (circuits for computer systems using fuzzy logic G06N7/02); Inverting circuits > using specified components (, H03K19/003 - H03K19/0175 take precedence) > using semiconductor devices (H03K19/173 takes precedence; wherein the semiconductor devices are only diode rectifiers H03K19/12) > using field-effect transistors

Of 8 combined children, 4 exist in both systems.

4 codes are CPC-only extensions.

3 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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H03K 19/09403 +4 CPC CPC only CPC only
H03K 19/09421 CPC only CPC only
H03K 19/09425 +1 CPC CPC only CPC only
H03K 19/09432 +1 CPC CPC only CPC only
H03K 19/0944 using MOSFET (H03K19/096 takes precedence) since 1990 +2 CPC IPC+CPC Available in IPC and CPC
H03K 19/0952 using Schottky type FET (, H03K19/096 take precedence) since 1990 IPC+CPC Available in IPC and CPC
H03K 19/0956 Schottky diode FET logic (H03K19/096 takes precedence) since 1990 IPC+CPC Available in IPC and CPC
H03K 19/096 Synchronous circuits, i.e. using clock signals since 1980 +2 CPC 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