H01F 21/005
Inductances without magnetic core
Official title: {Inductances without magnetic core}
H01F21/005 (Inductances without magnetic core) appears on 24 US grants and 26 published applications in this corpus.
Search patents in H01F- Granted patents
- 24
- Published applications
- 26
- Assignees
- 33
- Inventors
- 80
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 2 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 3 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 0 |
| 2019 | 0 | 3 |
| 2020 | 4 | 1 |
| 2021 | 1 | 4 |
| 2022 | 1 | 2 |
| 2023 | 1 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thin film inductor element and thin film variable inductor element6 Oct 2026US 12,755,882 B2Japan Atomic Energy Agency
- Coil former, inductive component and method for adjusting an inductance5 May 2026US 12,621,909 B2Philip Morris Products S. A.
- Radiating element and associated antenna and manufacturing method25 Jun 2024US 12,021,320 B2Centre National De La Recherche Scientifique
- Inductor device that can resist external interference and adjust inductance value and quality factor of inductor21 May 2024US 11,990,269 B2Realtek Semiconductor Corp.
- Rotary connector module for device forming quasi three-dimentional image26 Sep 2023US 11,770,045 B2
- Superconducting tunable inductance12 Mar 2026US 2026/0074102 A1D-Wave Systems Inc.
- Adjustable inductor, and transmission circuit for magnetic resonance3 Jul 2025US 2025/0218642 A1Wuhan United Imaging Life Science Instrument Co., Ltd.
- Thin film inductor element and thin film variable inductor element2 May 2024US 2024/0145147 A1Japan Atomic Energy Agency
- Inductor device that can resist external interference and adjust inductance value and quality factor of inductor16 Feb 2023US 2023/0049051 A1Realtek Semiconductor Corp.
- Radiating element and associated antenna and manufacturing method22 Dec 2022US 2022/0407234 A1Centre National De La Recherche Scientifique
Most cited
By later US patents
- Microwave tunable inductor and associated methods55US 7,148,783 B2Harris Corporation · 2006
- Planar inductor using liquid metal MEMS technology12US 7,477,123 B2Agilent Technologies, Inc. · 2009
- Method for manufacture of multi-layer-multi-turn high efficiency inductors12US 9,300,046 B2NuCurrent, Inc. · 2016
- Microelectromechanical tunable inductor11US 7,710,232 B1Sandia Corporation · 2010
- On-chip integrated voltage-controlled variable inductor, methods of making and tuning such variable inductors, and design structures integrating such variable inductors8US 8,138,876 B2International Business Machines Corporation · 2012