H01F 27/366
Made of ferromagnetic material
Official title: {made of ferromagnetic material}
H01F27/366 (Made of ferromagnetic material) appears on 658 US grants and 878 published applications in this corpus.
Search patents in H01F- Granted patents
- 658
- Published applications
- 878
- Assignees
- 362
- Inventors
- 1,712
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 3 |
| 2003 | 5 | 6 |
| 2004 | 1 | 6 |
| 2005 | 4 | 4 |
| 2006 | 2 | 9 |
| 2007 | 8 | 7 |
| 2008 | 1 | 7 |
| 2009 | 4 | 10 |
| 2010 | 3 | 8 |
| 2011 | 6 | 16 |
| 2012 | 8 | 16 |
| 2013 | 8 | 19 |
| 2014 | 13 | 31 |
| 2015 | 13 | 45 |
| 2016 | 23 | 39 |
| 2017 | 27 | 58 |
| 2018 | 52 | 93 |
| 2019 | 59 | 80 |
| 2020 | 61 | 68 |
| 2021 | 61 | 78 |
| 2022 | 67 | 79 |
| 2023 | 62 | 61 |
| 2024 | 62 | 63 |
| 2025 | 49 | 43 |
| 2026 | 29 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Variable magnetic layer for wireless charging6 Oct 2026US 12,755,898 B23M Innovative Properties Company
- Accessory device for low-voltage switches8 Sep 2026US 12,731,716 B2ABB AB
- Current transformer assemblies8 Sep 2026US 12,731,727 B2Schneider Electric USA, Inc.
- False notification suppression in wireless power transfer system25 Aug 2026US 12,719,315 B2NuCurrent, Inc.
- Contactless electrical energy transfer device18 Aug 2026US 12,709,170 B2Airbus SAS
- Layered double-d coil for wireless power transfer systems1 Oct 2026US 2026/0302836 A1Tennessee Technological University
- Planar coil array, and displacement sensor27 Aug 2026US 2026/0251480 A1Hitachi Astemo, Ltd.
- Transformer isolator having rf shield structure for effective magnetic power transfer27 Aug 2026US 2026/0253794 A1Lam Research Corporation
- Coil Module and Electronic Device20 Aug 2026US 2026/0246300 A1Huawei Technologies Co., Ltd.
- Electronic device for wirelessly charging battery13 Aug 2026US 2026/0238046 A1Samsung Electronics Co., Ltd.
Most cited
By later US patents
- System and method for inductive charging of portable devices499US 8,169,185 B2Mojo Mobility, Inc. · 2012
- Magnetic shield for primary coil of transcutaneous energy transfer device210US 6,324,430 B1ABIOMED, Inc. · 2001
- System and method for inductive charging of portable devices173US 8,629,654 B2Mojo Mobility, Inc. · 2014
- Efficiency and flexibility in inductive charging140US 8,947,047 B2Mojo Mobility, Inc. · 2015
- System and method that provides efficiency and flexiblity in inductive charging82US 9,276,437 B2Mojo Mobility, Inc. · 2016