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

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: ELECTRICITY
Class:: ELECTRONIC CIRCUITRY
Subclass:: DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER

Filing statistics

IPC H03D 7/00 belongs to the parent subclass H03D, which recorded 4,960 patent applications worldwide between 2013 and 2023. Annual filings declined from 574 in 2013 to 386 in 2023 (-33%). The most active applicants in class H03 are QUALCOMM (5,625 applications), SAMSUNG ELECTRONICS COMPANY (5,496 applications) and MURATA MANUFACTURING COMPANY (5,478 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

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

Related Keywords

TRANSFER(S) of modulation from one carrier wave to another

8 direct subcodes

Child Classifications

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H03D 7/02 by means of diodes
H03D 7/06 by means of discharge tubes having more than two electrodes
H03D 7/12 by means of semiconductor devices having more than two electrodes
H03D 7/14 Balanced arrangements
H03D 7/16 Multiple frequency-changing
H03D 7/18 Modifications of frequency-changers for eliminating image frequencies
H03D 7/2 by means of transit-time tubes
H03D 7/22 by deflecting an electron beam in a discharge tube

Top Applicants

Top 10 applicants by patent filingsfor 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