H01F 27/36
Electric or magnetic shields or screens
Official title: Electric or magnetic shields or screens (movable for varying inductance H01F21/10)
H01F27/36 (Electric or magnetic shields or screens) appears on 1,424 US grants and 1,763 published applications in this corpus.
Search patents in H01F- Granted patents
- 1,424
- Published applications
- 1,763
- Assignees
- 658
- Inventors
- 3,280
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 8 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 9 | 0 |
| 1985 | 11 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 8 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 2 |
| 2002 | 10 | 11 |
| 2003 | 16 | 23 |
| 2004 | 13 | 14 |
| 2005 | 14 | 20 |
| 2006 | 19 | 23 |
| 2007 | 19 | 24 |
| 2008 | 10 | 27 |
| 2009 | 9 | 29 |
| 2010 | 15 | 25 |
| 2011 | 30 | 38 |
| 2012 | 25 | 30 |
| 2013 | 19 | 45 |
| 2014 | 28 | 71 |
| 2015 | 33 | 102 |
| 2016 | 47 | 77 |
| 2017 | 61 | 108 |
| 2018 | 103 | 150 |
| 2019 | 103 | 153 |
| 2020 | 115 | 145 |
| 2021 | 109 | 133 |
| 2022 | 125 | 149 |
| 2023 | 116 | 117 |
| 2024 | 110 | 110 |
| 2025 | 98 | 83 |
| 2026 | 62 | 54 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and composition for lightning protection6 Oct 2026US 12,753,547 B2
- Variable magnetic layer for wireless charging6 Oct 2026US 12,755,898 B23M Innovative Properties Company
- Tap changer and a transformer arrangement comprising the tap changer29 Sep 2026US 12,749,618 B2Hitachi Energy Ltd
- Polymer and elastomer compositions having carbon nanostructure additives and articles formed therefrom for use in EMI and RFI shielding and in pressure sensing seals having quantum tunneling composite effects22 Sep 2026US 12,742,065 B2Greene, Tweed Technologies, Inc.
- Power capability detection for wireless power transmission based on receiver power request15 Sep 2026US 12,738,772 B2NuCurrent, Inc.
- Direct Current Quantum Magnetic Transformer and Related Energy Saving Devices and Methods1 Oct 2026US 2026/0302048 A1Harmonify AB
- Layered double-d coil for wireless power transfer systems1 Oct 2026US 2026/0302836 A1Tennessee Technological University
- Quick assembly common mode filter10 Sep 2026US 2026/0269121 A1Tai-Tech Advanced Electronics Co., Ltd.
- Planar coil array, and displacement sensor27 Aug 2026US 2026/0251480 A1Hitachi Astemo, Ltd.
- Test device and method for testing a high-voltage or medium-voltage cable and method for testing a transformer arranged in a test device27 Aug 2026US 2026/0251728 A1B2 Electronics GmbH
Most cited
By later US patents
- System and method for inductive charging of portable devices499US 8,169,185 B2Mojo Mobility, Inc. · 2012
- Inductive battery charger system with primary transformer windings formed in a multi-layer structure297US 7,164,255 B2City University of Hong Kong · 2007
- Planar inductive battery charging system223US 7,576,514 B2Cityu Research Limited · 2009
- Planar printed circuit-board transformers with effective electromagnetic interference (EMI) shielding216US 6,888,438 B2City University of Hong Kong · 2005
- Planar printed-circuit-board transformers with effective electromagnetic interference (EMI) shielding215US 6,501,364 B1City University of Hong Kong · 2002