H04B 14/004
Amplitude modulation
Official title: {Amplitude modulation}
H04B14/004 (Amplitude modulation) appears on 43 US grants and 30 published applications in this corpus.
Search patents in H04B- Granted patents
- 43
- Published applications
- 30
- Assignees
- 29
- Inventors
- 57
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 1 |
| 2017 | 2 | 4 |
| 2018 | 4 | 3 |
| 2019 | 7 | 5 |
| 2020 | 3 | 4 |
| 2021 | 6 | 3 |
| 2022 | 3 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Amplitude modulation transmission device20 Jan 2026US 12,531,516 B2Research & Business Foundation Sungkyunkwan University
- Systems and methods for supporting both pulse amplitude modulation and quadrature amplitude modulation10 Jun 2025US 12,328,219 B2Altera Corporation
- Communication devices and methods29 Oct 2024US 12,132,601 B2Sony Group Corporation
- Carrier-phase recovery system and method27 Sep 2022US 11,456,910 B1Cable Television Laboratories, Inc.
- Optical communication interface utilizing n-dimensional double square quadrature amplitude modulation20 Sep 2022US 11,451,300 B2Marvell Asia Pte Ltd
- Systems and Methods for Supporting Both Pulse Amplitude Modulation and Quadrature Amplitude Modulation2 Oct 2025US 2025/0310173 A1Altera Corporation
- Amplitude modulation transmission device20 Mar 2025US 2025/0096909 A1Research & Business Foundation Sungkyunkwan University
- Data transmission method and apparatus, communication node, and storage medium25 Jul 2024US 2024/0250861 A1Zte Corporation
- Communication devices and methods4 May 2023US 2023/0140226 A1Sony Group Corporation
- Systems and Methods for Supporting Both Pulse Amplitude Modulation and Quadrature Amplitude Modulation21 Oct 2021US 2021/0328852 A1Altera Corporation
Most cited
By later US patents
- Transmission system for telephone communications or data transfer47US 4,989,236 ASostel Oy · 1991
- Burst signal transmission system26US 4,592,073 ANEC Corporation · 1986
- Multidimensional signal modulation and/or demodulation for data communications21US 7,340,001 B2UT-Battelle, LLC · 2008
- Guard tone capture method13US 4,554,542 AMotorola, Inc. · 1985
- Sequentially balanced modulation tone ranging system and method12US 4,149,168 ACubic Corporation · 1979