H04K
Secret communication
Official title: Secret communication; jamming of communication
H04K (Secret communication) appears on 3,253 US grants and 2,833 published applications in this corpus.
Search patents in H04K- Granted patents
- 3,253
- Published applications
- 2,833
- Assignees
- 1,317
- Inventors
- 5,971
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 42 | 0 |
| 1977 | 17 | 0 |
| 1978 | 16 | 0 |
| 1979 | 23 | 0 |
| 1980 | 34 | 0 |
| 1981 | 17 | 0 |
| 1982 | 25 | 0 |
| 1983 | 20 | 0 |
| 1984 | 13 | 0 |
| 1985 | 12 | 0 |
| 1986 | 22 | 0 |
| 1987 | 24 | 0 |
| 1988 | 22 | 0 |
| 1989 | 24 | 0 |
| 1990 | 29 | 0 |
| 1991 | 26 | 0 |
| 1992 | 39 | 0 |
| 1993 | 31 | 0 |
| 1994 | 41 | 0 |
| 1995 | 21 | 0 |
| 1996 | 17 | 0 |
| 1997 | 15 | 0 |
| 1998 | 26 | 0 |
| 1999 | 31 | 0 |
| 2000 | 28 | 0 |
| 2001 | 38 | 11 |
| 2002 | 42 | 55 |
| 2003 | 33 | 74 |
| 2004 | 34 | 80 |
| 2005 | 39 | 86 |
| 2006 | 72 | 130 |
| 2007 | 61 | 190 |
| 2008 | 94 | 150 |
| 2009 | 80 | 110 |
| 2010 | 126 | 126 |
| 2011 | 133 | 123 |
| 2012 | 144 | 91 |
| 2013 | 134 | 104 |
| 2014 | 153 | 117 |
| 2015 | 125 | 121 |
| 2016 | 120 | 140 |
| 2017 | 157 | 124 |
| 2018 | 120 | 133 |
| 2019 | 162 | 125 |
| 2020 | 132 | 140 |
| 2021 | 135 | 123 |
| 2022 | 108 | 138 |
| 2023 | 128 | 105 |
| 2024 | 111 | 106 |
| 2025 | 90 | 74 |
| 2026 | 67 | 57 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
Recent patents
- Radio jamming detection6 Oct 2026US 12,756,493 B2Telit Cinterion Deutschland GmbH
- Measuring a resistance against an adversarial attack and estimating a parameter of an interference source29 Sep 2026US 12,750,153 B2Rohde & Schwarz GmbH & Co.KG
- Adaptive jammer detection29 Sep 2026US 12,750,154 B2QUALCOMM Incorporated
- Method for eliminating jamming by OAM mode quadratic coordination22 Sep 2026US 12,744,617 B2Xidian University
- Identification and mitigation of attacks and/or malfunction of autonomous vehicles sensor involving disappearing object15 Sep 2026US 12,739,051 B2Kyndryl, Inc.
- Enhanced Long Range Communication Schemes In Wireless Communications8 Oct 2026US 2026/0312715 A1Mediatek Inc.
- Transmitter, receiver, communication system and communication method for mimo communication enabling mitigation of an interfering transmitter1 Oct 2026US 2026/0303137 A1ETH Zurich
- Low-pass to notch reconfigurable filter24 Sep 2026US 2026/0291454 A1QUALCOMM Incorporated
- System, method and computer program product for detection of gnss jammers24 Sep 2026US 2026/0291638 A1Israel Aerospace Industries Ltd.
- Device for the tap-proof placement of a mobile telephone17 Sep 2026US 2026/0280747 A1Guardian, LLC
Most cited
By later US patents
- Remote medical supporting system1,503US 7,386,730 B2Olympus Corporation · 2008
- Computer system linked by using information in data objects1,131US 6,122,403 ADigimarc Corporation · 2000
- 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
- Signal processing apparatus and methods832US 4,694,490 A1987