H01F 17/04
Fixed inductances of the signal type: with magnetic core
Official title: with magnetic core
H01F17/04 (Fixed inductances of the signal type: with magnetic core) appears on 3,442 US grants and 4,454 published applications in this corpus.
Search patents in H01F- Granted patents
- 3,442
- Published applications
- 4,454
- Assignees
- 897
- Inventors
- 5,668
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 10 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 9 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 7 | 0 |
| 1985 | 9 | 0 |
| 1986 | 6 | 0 |
| 1987 | 8 | 0 |
| 1988 | 16 | 0 |
| 1989 | 14 | 0 |
| 1990 | 13 | 0 |
| 1991 | 12 | 0 |
| 1992 | 7 | 0 |
| 1993 | 12 | 0 |
| 1994 | 13 | 0 |
| 1995 | 10 | 0 |
| 1996 | 24 | 0 |
| 1997 | 10 | 0 |
| 1998 | 25 | 0 |
| 1999 | 26 | 0 |
| 2000 | 40 | 0 |
| 2001 | 31 | 12 |
| 2002 | 46 | 61 |
| 2003 | 51 | 60 |
| 2004 | 69 | 104 |
| 2005 | 55 | 85 |
| 2006 | 71 | 99 |
| 2007 | 68 | 107 |
| 2008 | 76 | 89 |
| 2009 | 60 | 104 |
| 2010 | 76 | 121 |
| 2011 | 86 | 87 |
| 2012 | 76 | 72 |
| 2013 | 65 | 111 |
| 2014 | 78 | 112 |
| 2015 | 67 | 126 |
| 2016 | 76 | 190 |
| 2017 | 110 | 211 |
| 2018 | 147 | 288 |
| 2019 | 183 | 333 |
| 2020 | 199 | 359 |
| 2021 | 226 | 338 |
| 2022 | 242 | 336 |
| 2023 | 327 | 286 |
| 2024 | 284 | 302 |
| 2025 | 241 | 269 |
| 2026 | 134 | 192 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01F 2017/048With encapsulating coreIndexing code1,048
- H01F 17/06With core substantially closed in itself1,013
- H01F 17/045With core of cylindric geometry and coil wound along its longitudinal axis838
- H01F 17/043With two, usually identical or nearly identical parts enclosing completely the coil194
- H01F 17/041Means for preventing rotation or displacement of the core23
Recent patents
- Coil component and IC card having the same6 Oct 2026US 12,755,129 B2TDK Corporation
- Electronic component6 Oct 2026US 12,755,893 B2Murata Manufacturing Co., Ltd.
- Manufacturing method of coil component and coil component29 Sep 2026US 12,746,712 B2Sumida Corporation
- Coil component29 Sep 2026US 12,749,612 B2Samsung Electro-Mechanics Co., Ltd.
- Coil device22 Sep 2026US 12,744,147 B2TDK Corporation
- Choke for a multi-conductor system8 Oct 2026US 2026/0311924 A1TDK Electronics Co., Ltd.
- Method of manufacturing a coil component1 Oct 2026US 2026/0295668 A1Murata Manufacturing Co., Ltd.
- Electronic component and information reading method1 Oct 2026US 2026/0302018 A1TDK Corporation
- Coil component1 Oct 2026US 2026/0302033 A1TDK Corporation
- Inductor and dc-dc converter1 Oct 2026US 2026/0302950 A1TDK Corporation
Most cited
By later US patents
- Power supply control223US 7,782,031 B2Intersil Americas Inc. · 2010
- Ferrite core185US 6,501,362 B1UMEC USA, Inc. · 2002
- Integrated circuit toroidal inductor182US 5,793,272 AInternational Business Machines Corporation · 1998
- Integrated circuit inductor175US 5,884,990 AInternational Business Machines Corporation · 1999
- Modular surface mount circuit device and a manufacturing method thereof161US 5,959,846 ACitizen Electronics Co., Ltd. · 1999