F42B 3/188
Having radio-frequency filters
Official title: having radio-frequency filters {, e.g. containing ferrite cores or inductances (F42B3/185 takes precedence)}
F42B3/188 (Having radio-frequency filters) appears on 47 US grants and 12 published applications in this corpus.
Search patents in F42B- Granted patents
- 47
- Published applications
- 12
- Assignees
- 30
- Inventors
- 82
- Latest grant
- 3 Sep 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 4 |
| 2003 | 3 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 2 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- RF attenuating switch3 Sep 2024US 12,078,461 B2Schlumberger Technology Corporation
- RF attenuating switch for use with explosives and method of using the same20 Jul 2021US 11,067,369 B2Schlumberger Technology Corporation
- Detonator ignition protection and detection circuit26 Jan 2016US 9,243,877 B2Dyno Nobel Inc.
- Electric and magnetic field hardened igniter for electrically fired ammunition13 Oct 2015US 9,157,708 B1The United States of America as represented by the Secretary of the Army
- Device for triggering an airbag9 Dec 2003US 6,659,011 B1DaimlerChrysler AG
- Compact electric detonator with built-in electromagnetic interference (emi) filter and method of assembling the same12 Mar 2026US 2026/0071856 A1Agency for Defense Development
- Rf Attenuating Switch4 Nov 2021US 2021/0341265 A1Schlumberger Technology Corporation
- Automatic Stein Hall Viscosity Cup24 Aug 2017US 2017/0241882 A9Marquip, Inc.
- Rf attenuating switch22 Jun 2017US 2017/0176152 A1Schlumberger Technology Corporation
- Detonator ignition protection and detection circuit20 Aug 2015US 2015/0233690 A1Dyno Nobel Inc.
Most cited
By later US patents
- Explosive detonation apparatus73US 5,503,077 AHalliburton Company · 1996
- Airbag igniter having double glass seal71US 5,140,906 AICI Americas Inc. · 1992
- Attenuator for protecting electronic equipment from undesired exposure to RF energy and/or lightning59US 5,243,911 A1993
- Universal squib connector for a gas generator58US 5,241,910 AMorton International, Inc. · 1993
- Universal squib connector56US 5,200,574 AMorton International, Inc. · 1993