Transference of modulation from one carrier to another, e.g. frequency-changing (H03D9/00, H03D11/00 take precedence; dielectric amplifiers, magnetic amplifiers, parametric amplifiers used as a frequency-changers H03F)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Transference of modulation from one carrier to another, e.g. frequency-changing

CPC: Transference of modulation from one carrier to another, e.g. frequency-changing (H03D9/00, H03D11/00 take precedence; dielectric amplifiers, magnetic amplifiers, parametric amplifiers used as a frequency-changers H03F)

Full Title

Full titles differ between systems:

IPC:

Transference of modulation from one carrier to another, e.g. frequency-changing

CPC:

Transference of modulation from one carrier to another, e.g. frequency-changing (H03D9/00, H03D11/00 take precedence; dielectric amplifiers, magnetic amplifiers, parametric amplifiers used as a frequency-changers H03F)

Additional Content IPC

Demodulation or transference of modulation of modulated electromagnetic waves Super-regenerative demodulator circuits Dielectric amplifiers, magnetic amplifiers, parametric amplifiers used as a frequency-changers

Of 9 combined children, 8 exist in both systems.

1 codes are CPC-only extensions.

5 shared codes have differing titles between IPC and CPC.

Child Classifications

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H03D 7/005 CPC only CPC only
H03D 7/02 by means of diodes (H03D7/14 - H03D7/22 take precedence) IPC+CPC Available in IPC and CPC
H03D 7/06 by means of discharge tubes having more than two electrodes (H03D7/14 - H03D7/22 take precedence) IPC+CPC Available in IPC and CPC
H03D 7/12 by means of semiconductor devices having more than two electrodes (H03D7/14 - H03D7/22 take precedence) +1 CPC IPC+CPC Available in IPC and CPC
H03D 7/14 Balanced arrangements +3 CPC IPC+CPC Available in IPC and CPC
H03D 7/16 Multiple-frequency-changing +2 CPC IPC+CPC Available in IPC and CPC
H03D 7/18 Modifications of frequency-changers for eliminating image frequencies IPC+CPC Available in IPC and CPC
H03D 7/20 by means of transit-time tubes IPC+CPC Available in IPC and CPC
H03D 7/22 by deflecting an electron beam in a discharge tube (H03D7/20 takes precedence) 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