H03C 1/00
Amplitude modulation
Official title: Amplitude modulation (H03C5/00, H03C7/00 take precedence)
H03C1/00 (Amplitude modulation) appears on 653 US grants and 324 published applications in this corpus.
Search patents in H03C- Granted patents
- 653
- Published applications
- 324
- Assignees
- 336
- Inventors
- 1,018
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 17 | 0 |
| 1978 | 13 | 0 |
| 1979 | 11 | 0 |
| 1980 | 10 | 0 |
| 1981 | 11 | 0 |
| 1982 | 14 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 15 | 0 |
| 1986 | 12 | 0 |
| 1987 | 18 | 0 |
| 1988 | 14 | 0 |
| 1989 | 14 | 0 |
| 1990 | 10 | 0 |
| 1991 | 9 | 0 |
| 1992 | 12 | 0 |
| 1993 | 11 | 0 |
| 1994 | 12 | 0 |
| 1995 | 19 | 0 |
| 1996 | 11 | 0 |
| 1997 | 10 | 0 |
| 1998 | 19 | 0 |
| 1999 | 14 | 0 |
| 2000 | 10 | 0 |
| 2001 | 13 | 6 |
| 2002 | 11 | 12 |
| 2003 | 11 | 23 |
| 2004 | 22 | 16 |
| 2005 | 7 | 17 |
| 2006 | 19 | 17 |
| 2007 | 19 | 21 |
| 2008 | 13 | 11 |
| 2009 | 12 | 16 |
| 2010 | 17 | 24 |
| 2011 | 16 | 11 |
| 2012 | 24 | 19 |
| 2013 | 19 | 13 |
| 2014 | 17 | 18 |
| 2015 | 18 | 21 |
| 2016 | 23 | 12 |
| 2017 | 12 | 4 |
| 2018 | 4 | 8 |
| 2019 | 11 | 10 |
| 2020 | 8 | 9 |
| 2021 | 15 | 10 |
| 2022 | 9 | 8 |
| 2023 | 8 | 7 |
| 2024 | 6 | 1 |
| 2025 | 3 | 6 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03C 1/52Modulators in which carrier or one sideband is wholly or partially suppressed198
- H03C 1/02Details115
- H03C 1/36Amplitude modulation: by means of semiconductor device having at least three electrodes108
- H03C 1/62Modulators in which amplitude of carrier component in output is dependent upon71
- H03C 1/08Amplitude modulation: by means of variable impedance element37
- H03C 1/50Amplitude modulation: by converting angle modulation to amplitude modulation30
- H03C 1/46Modulators with mechanically-driven or acoustically-driven parts27
- H03C 1/16Amplitude modulation: by means of discharge device having at least three electrodes15
Recent patents
- Systems, methods, and devices for electromagnetic modulation26 May 2026US 12,640,685 B2The MITRE Corporation
- Envelope-detector-less forward data receiving device5 May 2026US 12,620,934 B2Korea University Research and Business Foundation
- Switching interval modulation with pulse encoded transitions23 Sep 2025US 12,425,108 B2The Regents of the University of California
- Isolation integrated circuit, carrier frequency control circuit and modulation signal generation method29 Apr 2025US 12,289,187 B2PowerX Semiconductor Corporation
- Isolation communications channel using direct demodulation and data-edge encoding4 Feb 2025US 12,218,645 B2Skyworks Solutions, Inc.
- Methods and apparatus for facilitating operation of remote agents in challenging environments11 Jun 2026US 2026/0163883 A1
- Method and Device for Converting an Analog Input Signal into a Digital Output Signal12 Mar 2026US 2026/0074725 A1Siemens Aktiengesellschaft
- Oscillator circuitry for isolated systems5 Feb 2026US 2026/0039248 A1Texas Instruments Incorporated
- Input Facility, Controller, and Measurement Apparatus8 Jan 2026US 2026/0009824 A1Siemens Aktiengesellschaft
- Envelope-detector-less forward data receiving device23 Oct 2025US 2025/0330123 A1Korea University Research and Business Foundation
Most cited
By later US patents
- Device incorporating a tunable thin film bulk acoustic resonator for performing amplitude and phase modulation222US 5,714,917 ANokia Mobile Phones Ltd. · 1998
- Multi-channel digital transceiver and method218US 5,579,341 AMotorola, Inc. · 1996
- Method and system for down-converting electromagnetic signals185US 6,061,551 AParkerVision, Inc. · 2000
- Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same170US 6,813,485 B2ParkerVision, Inc. · 2004
- Multi-channel digital transceiver and method169US 5,818,883 AMotorola, Inc. · 1998