H04K 3/25
Based on characteristics of target signal or of transmission
Official title: {based on characteristics of target signal or of transmission (as countermeasure against surveillance H04K3/827), e.g. using direct sequence spread spectrum or fast frequency hopping (spread spectrum techniques H04B1/69)}
H04K3/25 (Based on characteristics of target signal or of transmission) appears on 284 US grants and 282 published applications in this corpus.
Search patents in H04K- Granted patents
- 284
- Published applications
- 282
- Assignees
- 140
- Inventors
- 453
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 7 | 2 |
| 2002 | 10 | 14 |
| 2003 | 9 | 4 |
| 2004 | 4 | 4 |
| 2005 | 3 | 2 |
| 2006 | 4 | 2 |
| 2007 | 3 | 54 |
| 2008 | 22 | 32 |
| 2009 | 16 | 19 |
| 2010 | 7 | 3 |
| 2011 | 13 | 12 |
| 2012 | 7 | 4 |
| 2013 | 12 | 6 |
| 2014 | 11 | 10 |
| 2015 | 7 | 15 |
| 2016 | 11 | 11 |
| 2017 | 7 | 12 |
| 2018 | 9 | 6 |
| 2019 | 17 | 9 |
| 2020 | 13 | 10 |
| 2021 | 8 | 10 |
| 2022 | 10 | 14 |
| 2023 | 12 | 6 |
| 2024 | 6 | 11 |
| 2025 | 7 | 7 |
| 2026 | 10 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for eliminating jamming by OAM mode quadratic coordination22 Sep 2026US 12,744,617 B2Xidian University
- Wireless communication device and method for real-time or near real-time jamming signals mitigation8 Sep 2026US 12,732,301 B1Peltbeam Inc.
- Multi-tone jammer mitigation7 Jul 2026US 12,676,692 B2QUALCOMM Incorporated
- Method of performing anti-jamming techniques through antenna beam hopping in communication systems implemented by using plurality of relay and electronic apparatus thereof16 Jun 2026US 12,659,006 B2Agency for Defense Development
- Angle-of-arrival open-loop frequency-hopping communication system12 May 2026US 12,627,394 B1Rockwell Collins, Inc.
- Apparatus and method for detecting and responding to mobile communication radio frequency jamming attacks in open ran environment21 May 2026US 2026/0142741 A1Electronics and Telecommunications Research Institute
- Guidance method and system for calculating course correction when navigating using unintended radio frequency or radiative emissions1 Jan 2026US 2026/0004666 A1Argus Industrial, LLC.
- Method, system and storage medium of signal acquisition based on selective coherent integration for anti-jam of protected global positioning system user equipment1 Jan 2026US 2026/0005786 A1Intelligent Fusion Technology, Inc.
- Waveform analysis and vulnerability assessment (wave) tool13 Nov 2025US 2025/0348766 A1The Aerospace Corporation
- Identification and mitigation of jamming attacks on autonomous vehicles16 Oct 2025US 2025/0323751 A1Kyndryl, Inc.
Most cited
By later US patents
- Method for collecting data using compact internetworked wireless integrated network sensors (WINS)932US 6,735,630 B1Sensoria Corporation · 2004
- Method and apparatus for internetworked wireless integrated network sensor (WINS) nodes858US 6,859,831 B1Sensoria Corporation · 2005
- Method and apparatus for distributed signal processing among internetworked wireless integrated network sensors (WINS)510US 6,832,251 B1Sensoria Corporation · 2004
- Apparatus for internetworked hybrid wireless integrated network sensors (WINS)463US 6,826,607 B1Sensoria Corporation · 2004
- Transport of payload information and control messages on multiple orthogonal carriers spread throughout substantially all of a frequency bandwith320US 6,275,990 B1ADC Telecommunications, Inc. · 2001