H03C 1/52 Modulators in which carrier or one sideband is wholly or partially suppressed (H03C1/28 - H03C1/34, H03C1/46, H03C1/48 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Modulators in which carrier or one sideband is wholly or partially suppressed
CPC: Modulators in which carrier or one sideband is wholly or partially suppressed (H03C1/28 - H03C1/34, H03C1/46, H03C1/48 take precedence)
Full Title
Full titles differ between systems:
Amplitude modulation > Modulators in which carrier or one sideband is wholly or partially suppressed
Amplitude modulation (H03C5/00, H03C7/00 take precedence) > Modulators in which carrier or one sideband is wholly or partially suppressed (H03C1/28 - H03C1/34, H03C1/46, H03C1/48 take precedence)
Additional Content IPC
Amplitude modulation by means of transit-time tube Amplitude modulation by means of a magnetron Amplitude modulation by deflection of electron beam in discharge tube Amplitude modulation by means of light-sensitive element Amplitude modulators with mechanically or acoustically driven parts Amplitude modulation by means of Hall-effect devices
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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- H03C 1/54 Balanced modulators, e.g. bridge type, ring type or double balanced type +1 CPC 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