H03C MODULATION
Introduced: September 1968
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- MODULATION
Description
H03C covers electronic circuits and devices for modulating signals, where information is encoded onto a carrier wave by varying one or more of its characteristics (amplitude, frequency, phase, or pulse properties). This subclass encompasses modulator designs, modulation techniques, and integrated circuit implementations across analog and digital domains, including amplitude modulation (AM), frequency modulation (FM), phase modulation (PM), and pulse modulation methods. Related demodulation circuits are classified separately under H03D, while specific modulation applications in telecommunications, broadcasting, and radar systems may be further detailed in their respective technology classes.
Filing statistics
IPC subclass H03C 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
In class comparison
H03C ranks 9th of 10 subclasses with filings in H03, with 1,283 applications between 2013 and 2023, 0.4% of the class. Annual filings declined 63% from 2013 to 2023, below the class as a whole (+15%).
| Rank | Subclass | Title | Applications | Share |
|---|---|---|---|---|
| 1 | H03K, Pulse Technique | Pulse Technique | 110,917 | 32.9% |
| 2 | H03M, Coding, Decoding or Code Conversion, in General | Coding, Decoding or Code Conversion, in General | 65,789 | 19.5% |
| 3 | H03H, Impedance Networks, e.g. Resonant Circuits; Resonators | Impedance Networks, e.g. Resonant Circuits; Resonators | 56,431 | 16.7% |
| 4 | H03F, Amplifiers | Amplifiers | 50,749 | 15.0% |
| 5 | H03L, Automatic Control, Starting, Synchronisation or Stabilisation of Generators of Electronic Oscillations or Pulses | Automatic Control, Starting, Synchronisation or Stabilisation of Generators of Electronic Oscillations or Pulses | 21,048 | 6.2% |
| 6 | H03G, Control of Amplification | Control of Amplification | 13,146 | 3.9% |
| 7 | H03B, Generation of Oscillations, Directly or by Frequency-Changing, by Circuits Employing Active Elements Which Operate in a Non-Switching Manner; Generation of Noise by Such Circuits | Generation of Oscillations, Directly or by Frequency-Changing, by Circuits Employing Active Elements Which Operate in a Non-Switching Manner; Generation of Noise by Such Circuits | 11,859 | 3.5% |
| 8 | H03D, Demodulation or Transference of Modulation From One Carrier to Another | Demodulation or Transference of Modulation From One Carrier to Another | 4,960 | 1.5% |
| 9 | H03C | Modulation | 1,283 | 0.4% |
| 10 | H03J, Tuning Resonant Circuits; Selecting Resonant Circuits | Tuning Resonant Circuits; Selecting Resonant Circuits | 1,256 | 0.4% |
Source: EPO PATSTAT, worldwide filings
Additional Content
Masers, lasers Coding, decoding or code conversion, in general
Related Keywords
5 direct subcodes
Child Classifications
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- H03C 1/00 Amplitude modulation
- H03C 3/00 Angle modulation
- H03C 5/00 Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal
- H03C 7/00 Modulating electromagnetic waves
- H03C 99/00 Subject matter not provided for in other groups of this subclass
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