H04L 27/02
Amplitude-modulated carrier systems
Official title: Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation (H04L27/32 takes precedence)
H04L27/02 (Amplitude-modulated carrier systems) appears on 2,489 US grants and 2,375 published applications in this corpus.
Search patents in H04L- Granted patents
- 2,489
- Published applications
- 2,375
- Assignees
- 777
- Inventors
- 3,756
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 5 | 0 |
| 1978 | 8 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 11 | 0 |
| 1982 | 10 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 5 | 0 |
| 1987 | 13 | 0 |
| 1988 | 7 | 0 |
| 1989 | 10 | 0 |
| 1990 | 8 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 10 | 0 |
| 1996 | 11 | 0 |
| 1997 | 26 | 0 |
| 1998 | 37 | 0 |
| 1999 | 28 | 0 |
| 2000 | 29 | 0 |
| 2001 | 33 | 9 |
| 2002 | 31 | 42 |
| 2003 | 34 | 38 |
| 2004 | 42 | 76 |
| 2005 | 38 | 90 |
| 2006 | 51 | 81 |
| 2007 | 58 | 79 |
| 2008 | 47 | 74 |
| 2009 | 75 | 104 |
| 2010 | 71 | 107 |
| 2011 | 76 | 83 |
| 2012 | 110 | 72 |
| 2013 | 123 | 96 |
| 2014 | 127 | 124 |
| 2015 | 136 | 132 |
| 2016 | 141 | 100 |
| 2017 | 141 | 111 |
| 2018 | 106 | 115 |
| 2019 | 141 | 129 |
| 2020 | 113 | 127 |
| 2021 | 103 | 102 |
| 2022 | 122 | 116 |
| 2023 | 104 | 100 |
| 2024 | 99 | 78 |
| 2025 | 63 | 103 |
| 2026 | 44 | 87 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- CP-transparent OOK OFDM waveform for an ambient IoT6 Oct 2026US 12,756,604 B2QUALCOMM Incorporated
- Modulation signal processing apparatus and method, and microcontroller unit and electronic device6 Oct 2026US 12,756,605 B2Zhejiang Geoforcechip Technology Co., Ltd.
- Communications operations in wireless power systems29 Sep 2026US 12,749,929 B2Apple Inc.
- Wirelessly powered sensor system22 Sep 2026US 12,744,412 B2NuCurrent, Inc.
- Method and transmitter for transmitting data using constellation15 Sep 2026US 12,739,056 B2Mitsubishi Electric Corporation
- Methods for cyclic prefix handling for low-power receivers8 Oct 2026US 2026/0312858 A1
- Energy efficient ook based synchronization signal8 Oct 2026US 2026/0313568 A1
- Non-orthogonal multiplexing of low-power signals and non-low-power signals1 Oct 2026US 2026/0303272 A1QUALCOMM Incorporated
- Extended symbol decoding1 Oct 2026US 2026/0303419 A1Microchip Technology Incorporated
- Ambient power synchronization field1 Oct 2026US 2026/0303420 A1QUALCOMM Incorporated
Most cited
By later US patents
- Serial communication protocol for medical device579US 9,226,766 B2Ethicon Endo-Surgery, Inc. · 2016
- Microstimulator employing improved recharging reporting and telemetry techniques440US 7,437,193 B2Boston Scientific Neuromodulation Corporation · 2008
- Telemetry system for use with microstimulator293US 7,177,698 B2Advanced Bionics AG · 2007
- Method and apparatus for optimization of wireless communications231US 5,822,373 APittway Corporation · 1998
- Embedded data link and protocol216US 5,741,314 A1998