H01F 27/327
Encapsulating or impregnating
Official title: {Encapsulating or impregnating (encapsulating coil and core H01F27/022)}
H01F27/327 (Encapsulating or impregnating) appears on 505 US grants and 604 published applications in this corpus.
Search patents in H01F- Granted patents
- 505
- Published applications
- 604
- Assignees
- 260
- Inventors
- 1,447
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 8 | 0 |
| 2001 | 6 | 0 |
| 2002 | 7 | 8 |
| 2003 | 11 | 14 |
| 2004 | 11 | 16 |
| 2005 | 8 | 10 |
| 2006 | 12 | 11 |
| 2007 | 6 | 14 |
| 2008 | 5 | 13 |
| 2009 | 7 | 11 |
| 2010 | 15 | 11 |
| 2011 | 12 | 21 |
| 2012 | 12 | 12 |
| 2013 | 9 | 23 |
| 2014 | 16 | 13 |
| 2015 | 8 | 16 |
| 2016 | 13 | 18 |
| 2017 | 14 | 17 |
| 2018 | 10 | 43 |
| 2019 | 22 | 69 |
| 2020 | 24 | 58 |
| 2021 | 37 | 59 |
| 2022 | 51 | 31 |
| 2023 | 42 | 32 |
| 2024 | 33 | 38 |
| 2025 | 29 | 26 |
| 2026 | 21 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Transformer, power conversion device, product group of transformer, and manufacturing method for transformer18 Aug 2026US 12,712,115 B2Mitsubishi Electric Corporation
- Transformers with separated magnetic members18 Aug 2026US 12,712,122 B2Texas Instruments Incorporated
- Transformer arrangement4 Aug 2026US 12,700,536 B2Hitachi Energy Ltd
- Inductor14 Jul 2026US 12,683,070 B2Tai-Tech Advanced Electronics Co., Ltd.
- Coil component30 Jun 2026US 12,671,025 B2Samsung Electro-Mechanics Co., Ltd.
- Coil component1 Oct 2026US 2026/0302041 A1TDK Corporation
- Medium-voltage isolation transformer1 Oct 2026US 2026/0302056 A1Delta Electronics, Inc.
- Internally-cooled actuator coil24 Sep 2026US 2026/0290679 A1ASML Netherlands B. V.
- X-ray generation module3 Sep 2026US 2026/0262154 A1Dentium Co., Ltd.
- Submodule for single packaging type semiconductor transformer with excellent insulation performance27 Aug 2026US 2026/0253793 A1Hyosung Heavy Industries Corporation
Most cited
By later US patents
- Transformer assembling method, transformer, transformer-mounted substrate, power supply unit having transformer-mounted substrate, and recording apparatus including power supply unit96US 6,437,673 B1Canon Kabushiki Kaisha · 2002
- Flux concentrator and method of making a magnetic flux concentrator79US 8,692,639 B2Access Business Group International LLC · 2014
- High-voltage winding for core-form power transformers44US 4,864,266 AElectric Power Research Institute, Inc. · 1989
- Magnetic device, method for manufacturing the same, and power supply module equipped with the same35US 6,768,409 B2Matsushita Electric Industrial Co., Ltd. · 2004
- Process for manufacturing a polymeric encapsulated transformer34US 5,036,580 AE. I. Du Pont de Nemours and Company · 1991