Single-ended push-pull amplifiers ; Phase-splitters therefor

Introduced: September 1968

Title

Titles differ between systems:

IPC: Single-ended push-pull amplifiers; Phase-splitters therefor

CPC: Single-ended push-pull amplifiers ; Phase-splitters therefor

Full Title

Full titles differ between systems:

IPC:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > Single-ended push-pull amplifiers; Phase-splitters therefor

CPC:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > Single-ended push-pull amplifiers ; Phase-splitters therefor

CPC subdivides this area 5x more granularly than IPC with 5 additional codes.

5 codes are CPC-only extensions, 1 exist only in IPC.

Child Classifications

Navigate with arrow keys, Enter to open

H03F 3/3001 +8 CPC CPC only CPC only
H03F 3/3066 +1 CPC CPC only CPC only
H03F 3/3069 +2 CPC CPC only CPC only
H03F 3/3081 CPC only CPC only
H03F 3/3083 +2 CPC CPC only CPC only
H03F 3/32 with tubes only IPC only IPC only

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