H01F 27/346
Preventing or reducing leakage fields
Official title: {Preventing or reducing leakage fields (using magnetic shields H01F27/36; using auxiliary windings H01F27/38)}
H01F27/346 (Preventing or reducing leakage fields) appears on 310 US grants and 394 published applications in this corpus.
Search patents in H01F- Granted patents
- 310
- Published applications
- 394
- Assignees
- 241
- Inventors
- 929
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 7 | 0 |
| 2002 | 1 | 2 |
| 2003 | 4 | 3 |
| 2004 | 0 | 5 |
| 2005 | 5 | 5 |
| 2006 | 6 | 11 |
| 2007 | 6 | 5 |
| 2008 | 8 | 7 |
| 2009 | 4 | 18 |
| 2010 | 9 | 13 |
| 2011 | 11 | 9 |
| 2012 | 8 | 13 |
| 2013 | 8 | 13 |
| 2014 | 4 | 13 |
| 2015 | 11 | 28 |
| 2016 | 13 | 14 |
| 2017 | 15 | 18 |
| 2018 | 14 | 26 |
| 2019 | 17 | 30 |
| 2020 | 24 | 25 |
| 2021 | 19 | 32 |
| 2022 | 17 | 24 |
| 2023 | 18 | 22 |
| 2024 | 27 | 35 |
| 2025 | 16 | 10 |
| 2026 | 13 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electric transformer with an increased total leakage impedance29 Sep 2026US 12,749,616 B2Exxelia
- Inductor component11 Aug 2026US 12,706,243 B2Murata Manufacturing Co., Ltd.
- Coil component, and substrate with integrated coil23 Jun 2026US 12,665,126 B2Rohm Co., Ltd.
- Reactor, converter, and power conversion device16 Jun 2026US 12,658,353 B2Autonetworks Technologies, Ltd.
- Lens barrel, camera, imaging apparatus, and coil component16 Jun 2026US 12,658,360 B2Canon Kabushiki Kaisha
- Coil component, and substrate with integrated coil24 Sep 2026US 2026/0290682 A1Rohm Co., Ltd.
- Reactor, converter, and power conversion device23 Jul 2026US 2026/0213066 A1Autonetworks Technologies, Ltd.
- Power Transfer Control Method in a Rotary Transformer23 Jul 2026US 2026/0213067 A1Irp Nexus Group Ltd.
- Module with Reversely Coupled Inductors and Magnetic Molded Compound (MMC)16 Jul 2026US 2026/0204474 A1Texas Instruments Incorporated
- Magnetic flux cancellation inductor pairing2 Jul 2026US 2026/0188568 A1NVIDIA Corporation
Most cited
By later US patents
- High Q integrated inductor79US 5,635,892 ALucent Technologies Inc. · 1997
- Packaging for patches62US 5,950,830 AEthical Pharmaceuticals (U.K.) Limited · 1999
- Transformer with controlled interwinding coupling and controlled leakage inducances and circuit using such transformer60US 5,719,544 AVLT, Inc. · 1998
- Inductor structure56US 8,841,983 B2Cambridge Silicon Radio Limited · 2014
- Method of and inductor layout for reduced VCO coupling48US 7,151,430 B2Telefonaktiebolaget LM Ericsson (publ) · 2006