by means of variable impedance

Introduced: September 1968

Last revised: January 2006

Full Title

Angle modulation > by means of variable impedance

Classification Context

Section:: ELECTRICITY
Class:: ELECTRONIC CIRCUITRY
Subclass:: MODULATION

Additional Content

Angle modulation by means of transit-time tube Angle modulation the tube being a magnetron Angle modulation by deflection of electron beam in discharge tube Angle modulation by means of light-sensitive element Conversion of amplitude to angle modulation

3 direct subcodes

Child Classifications

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H03C 3/12 by means of a variable reactive element
H03C 3/24 by means of a variable resistive element, e.g. tube
H03C 3/28 using variable impedance driven mechanically or acoustically

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