IPC Subgroup
H03C 3/12 by means of a variable reactive element
Introduced: September 1968
Last revised: January 2006
Full Title
Angle modulation > by means of variable impedance > by means of a variable reactive element
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- MODULATION
Filing statistics
IPC H03C 3/12 belongs to the parent subclass H03C, which recorded 1,283 patent applications worldwide between 2013 and 2023. Annual filings declined from 191 in 2013 to 71 in 2023 (-63%). 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
4 direct subcodes
Child Classifications
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- H03C 3/14 simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
- H03C 3/18 the element being a current-dependent inductor
- H03C 3/2 the element being a voltage-dependent capacitor
- H03C 3/22 the element being a semiconductor diode, e.g. varicap diode
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