H04B 7/22
Scatter propagation systems
Official title: Scatter propagation systems {, e.g. ionospheric, tropospheric or meteor scatter}
H04B7/22 (Scatter propagation systems) appears on 146 US grants and 186 published applications in this corpus.
Search patents in H04B- Granted patents
- 146
- Published applications
- 186
- Assignees
- 93
- Inventors
- 356
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 2 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 3 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 3 | 3 |
| 2015 | 4 | 4 |
| 2016 | 1 | 7 |
| 2017 | 6 | 3 |
| 2018 | 9 | 3 |
| 2019 | 3 | 7 |
| 2020 | 9 | 13 |
| 2021 | 10 | 15 |
| 2022 | 15 | 8 |
| 2023 | 10 | 20 |
| 2024 | 15 | 40 |
| 2025 | 14 | 40 |
| 2026 | 22 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and device of back scattering communication8 Sep 2026US 12,732,267 B2Guangdong Oppo Mobile Telecommunications Corp., Ltd.
- Frequency division duplexing operation of ambient internet of things device1 Sep 2026US 12,726,268 B2QUALCOMM Incorporated
- Radio device, reader device and method for operating them1 Sep 2026US 12,726,269 B2Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
- Coordinated customization of harvesting conditions to ambient power devices25 Aug 2026US 12,719,568 B2Cisco Technology, Inc.
- Backscatter device certificate on-boarding for secure communication18 Aug 2026US 12,712,601 B2Cisco Technology, Inc.
- Radio device, reader device and method for operating them8 Oct 2026US 2026/0312677 A1Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
- Systems and methods for generating and steering orbital angular momentum electromagnetic beams17 Sep 2026US 2026/0280618 A1Huawei Technologies Co., Ltd.
- Hybrid waveforms for energy harvesting (eh)-capable devices6 Aug 2026US 2026/0230176 A1QUALCOMM Incorporated
- Backscatter device onboarding25 Jun 2026US 2026/0180678 A1Cisco Technology, Inc.
- Tracking system exploiting over-the-horizon burst communications via hypersonic vehicle ionization trails18 Jun 2026US 2026/0169150 A1BAE Systems Information and Electronic Systems Integration Inc.
Most cited
By later US patents
- Method and apparatus for transmitting messages to and from remote locations121US 4,030,033 ALowell Technological Institute Research Foundation · 1977
- Digital communications system with immunity to frequency selective fading113US 3,980,945 ARaytheon Company · 1976
- Backscatter interrogators, communication systems and backscatter communication methods103US 6,459,726 B1Micron Technology, Inc. · 2002
- Tropospheric scatter communication system having angle diversity80US 4,564,935 AThe United States of America as represented by the Secretary of the Air Force · 1986
- System for transmitting data through a troposcatter medium69US 4,601,046 A1986