DIFF Main Group
H03C 1/00 Amplitude modulation (H03C5/00, H03C7/00 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Amplitude modulation
CPC: Amplitude modulation (H03C5/00, H03C7/00 take precedence)
Full Title
Full titles differ between systems:
IPC:
Amplitude modulation
CPC:
Amplitude modulation (H03C5/00, H03C7/00 take precedence)
Additional Content IPC
Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal Modulating electromagnetic waves
IPC and CPC are identically structured here. All 12 subcodes exist in both systems.
6 shared codes have differing titles between IPC and CPC.
Child Classifications
Navigate with arrow keys, Enter to open
- H03C 1/08 by means of variable impedance element (H03C1/28 - H03C1/34, H03C1/46 - H03C1/52, H03C1/62 take precedence) IPC+CPC Available in IPC and CPC
- H03C 1/16 by means of discharge device having at least three electrodes (H03C1/28 - H03C1/34, H03C1/50, H03C1/52, H03C1/62 take precedence) IPC+CPC Available in IPC and CPC
- H03C 1/36 by means of semiconductor device having at least three electrodes (H03C1/34, H03C1/50, H03C1/52, H03C1/62 take precedence) IPC+CPC Available in IPC and CPC
- H03C 1/46 Modulators with mechanically-driven or acoustically-driven parts IPC+CPC Available in IPC and CPC
- H03C 1/50 by converting angle modulation to amplitude modulation (H03C1/28 - H03C1/34, H03C1/46, H03C1/48 take precedence) IPC+CPC Available in IPC and CPC
- 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) IPC+CPC Available in IPC and CPC
- H03C 1/62 Modulators in which amplitude of carrier component in output is dependent upon strength of modulating signal, e.g. no carrier output when no modulating signal is present (H03C1/28 - H03C1/34, H03C1/46, H03C1/48 take precedence) 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