H04K 3/68
Using passive jamming
Official title: {using passive jamming, e.g. by shielding or reflection (shielding of apparatus or components against electric or magnetic field H05K9/00)}
H04K3/68 (Using passive jamming) appears on 129 US grants and 116 published applications in this corpus.
Search patents in H04K- Granted patents
- 129
- Published applications
- 116
- Assignees
- 78
- Inventors
- 286
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 1 |
| 2003 | 2 | 1 |
| 2004 | 2 | 4 |
| 2005 | 2 | 2 |
| 2006 | 2 | 3 |
| 2007 | 3 | 1 |
| 2008 | 3 | 8 |
| 2009 | 1 | 3 |
| 2010 | 5 | 5 |
| 2011 | 1 | 6 |
| 2012 | 6 | 3 |
| 2013 | 5 | 6 |
| 2014 | 7 | 3 |
| 2015 | 4 | 4 |
| 2016 | 2 | 7 |
| 2017 | 5 | 6 |
| 2018 | 7 | 9 |
| 2019 | 10 | 5 |
| 2020 | 4 | 12 |
| 2021 | 5 | 8 |
| 2022 | 13 | 8 |
| 2023 | 8 | 3 |
| 2024 | 6 | 6 |
| 2025 | 7 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems, devices and methods for detection and/or prevention of power line communication17 Feb 2026US 12,556,300 B2S.G.A. Innovations Ltd.
- Systems and methods for adaptive additive sound14 Oct 2025US 12,444,400 B2Google Inc.
- Secure audio firewall to neutralize promiscuous listening devices23 Sep 2025US 12,424,193 B1
- Information leakage prevention shield device23 Sep 2025US 12,425,122 B2Mitsubishi Electric Corporation
- Methods for reconfigurable intelligent surface (RIS) aided cooperative directional security27 May 2025US 12,317,087 B2QUALCOMM Incorporated
- Device for the tap-proof placement of a mobile telephone17 Sep 2026US 2026/0280747 A1Guardian, LLC
- Signal masking for secure backscattered communication10 Jul 2025US 2025/0226880 A1Microsoft Technology Licensing, LLC
- Privacy Device For Smart Speakers5 Dec 2024US 2024/0406648 A1
- Signal masking for secure backscattered communication24 Oct 2024US 2024/0356635 A1Microsoft Technology Licensing, LLC
- Methods for Reconfigurable Intelligent Surface (RIS) Aided Cooperative Directional Security17 Oct 2024US 2024/0349060 A1QUALCOMM Incorporated
Most cited
By later US patents
- Airborne radar jamming system227US 8,830,112 B1The Boeing Company · 2014
- Automatic electronic device detection125US 6,765,492 B22004
- Automatic cell phone detection at a combustible delivery station123US 6,222,458 B12001
- Enhanced versatility of a program control by a combination of technologies81US 5,303,295 AScientific-Atlanta, Inc. · 1994
- Automatic electronic device detection75US 6,580,372 B12003