using travelling-wave tubes

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > Amplifiers using transit-time effect in tubes or semiconductor devices > using travelling-wave tubes

CPC:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > Amplifiers using transit-time effect in tubes or semiconductor devices (parametric amplifiers H03F7/00; solid state travelling-wave devices H10N70/10) > using travelling-wave tubes

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

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