H04L 27/20
Modulator circuits
Official title: Modulator circuits; Transmitter circuits
H04L27/20 (Modulator circuits) appears on 2,566 US grants and 2,132 published applications in this corpus.
Search patents in H04L- Granted patents
- 2,566
- Published applications
- 2,132
- Assignees
- 779
- Inventors
- 4,083
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 12 | 0 |
| 1978 | 12 | 0 |
| 1979 | 6 | 0 |
| 1980 | 7 | 0 |
| 1981 | 8 | 0 |
| 1982 | 7 | 0 |
| 1983 | 2 | 0 |
| 1984 | 10 | 0 |
| 1985 | 18 | 0 |
| 1986 | 15 | 0 |
| 1987 | 17 | 0 |
| 1988 | 14 | 0 |
| 1989 | 18 | 0 |
| 1990 | 16 | 0 |
| 1991 | 22 | 0 |
| 1992 | 18 | 0 |
| 1993 | 22 | 0 |
| 1994 | 18 | 0 |
| 1995 | 23 | 0 |
| 1996 | 28 | 0 |
| 1997 | 31 | 0 |
| 1998 | 57 | 0 |
| 1999 | 43 | 0 |
| 2000 | 41 | 0 |
| 2001 | 40 | 17 |
| 2002 | 50 | 56 |
| 2003 | 32 | 46 |
| 2004 | 51 | 78 |
| 2005 | 34 | 59 |
| 2006 | 68 | 80 |
| 2007 | 41 | 87 |
| 2008 | 83 | 78 |
| 2009 | 66 | 76 |
| 2010 | 68 | 73 |
| 2011 | 68 | 68 |
| 2012 | 90 | 99 |
| 2013 | 93 | 105 |
| 2014 | 120 | 94 |
| 2015 | 141 | 116 |
| 2016 | 110 | 126 |
| 2017 | 114 | 114 |
| 2018 | 107 | 92 |
| 2019 | 141 | 116 |
| 2020 | 110 | 117 |
| 2021 | 106 | 105 |
| 2022 | 85 | 86 |
| 2023 | 81 | 69 |
| 2024 | 86 | 73 |
| 2025 | 78 | 62 |
| 2026 | 24 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Signal processing method and apparatus22 Sep 2026US 12,744,696 B2Huawei Technologies Co., Ltd.
- Transmission device and transmission method8 Sep 2026US 12,732,238 B2Panasonic Intellectual Property Corporation of America
- Multi-layer transmission and reception method in 1-bit quantization system, and apparatus therefor8 Sep 2026US 12,732,404 B2LG Electronics Inc.
- Transmission and reception without precise timing capability1 Sep 2026US 12,726,390 B2Samsung Electronics Co., Ltd.
- Method and device for transmitting/receiving wireless signal in communication system25 Aug 2026US 12,719,724 B2Electronics and Telecommunications Research Institute
- Method and device for carrying out multi-layer transmission in wireless lan system8 Oct 2026US 2026/0312637 A1LG Electronics Inc.
- Channel estimation reference signal on quadrature amplitude modulation sub-constellation24 Sep 2026US 2026/0291800 A1QUALCOMM Incorporated
- Communication Method and Apparatus24 Sep 2026US 2026/0292662 A1Huawei Technologies Co., Ltd.
- Method and apparatus for performing channel sounding using transparent pseudo random noise17 Sep 2026US 2026/0280799 A1Samsung Electronics Co., Ltd.
- Linear modulator for signaling at thz frequencies17 Sep 2026US 2026/0280948 A1Attotude, Inc.
Most cited
By later US patents
- Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum691US 5,282,222 A1994
- Method and apparatus for generating and collecting viewing statistics for remote terminals in a cable television system432US 5,251,324 AScientific-Atlanta, Inc. · 1993
- Interactive television and data transmission system366US 4,750,036 ARadio Telcom & Technology, Inc. · 1988
- Code division multiple access (CDMA) communication system333US 6,157,619 AInterDigital Technology Corporation · 2000
- Interactive television and data transmission system314US 5,177,604 ARadio Telcom & Technology, Inc. · 1993