H01F 27/263
Fastening parts of the core together
Official title: {Fastening parts of the core together}
H01F27/263 (Fastening parts of the core together) appears on 541 US grants and 780 published applications in this corpus.
Search patents in H01F- Granted patents
- 541
- Published applications
- 780
- Assignees
- 298
- Inventors
- 1,474
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 2 |
| 2002 | 4 | 2 |
| 2003 | 5 | 5 |
| 2004 | 2 | 12 |
| 2005 | 5 | 3 |
| 2006 | 4 | 8 |
| 2007 | 3 | 6 |
| 2008 | 3 | 8 |
| 2009 | 4 | 13 |
| 2010 | 10 | 17 |
| 2011 | 11 | 18 |
| 2012 | 11 | 21 |
| 2013 | 15 | 32 |
| 2014 | 20 | 24 |
| 2015 | 14 | 41 |
| 2016 | 13 | 25 |
| 2017 | 28 | 29 |
| 2018 | 24 | 47 |
| 2019 | 23 | 62 |
| 2020 | 39 | 72 |
| 2021 | 34 | 65 |
| 2022 | 46 | 56 |
| 2023 | 48 | 65 |
| 2024 | 52 | 66 |
| 2025 | 38 | 43 |
| 2026 | 25 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Core piece, reactor, converter, and power conversion device6 Oct 2026US 12,755,888 B2Autonetworks Technologies, Ltd.
- Twisted-core type low-profile coupled inductor8 Sep 2026US 12,731,725 B2Analog Devices, Inc.
- Transformers with separated magnetic members18 Aug 2026US 12,712,122 B2Texas Instruments Incorporated
- Control device for power conversion device28 Jul 2026US 12,695,026 B2Honda Motor Co., Ltd.
- Induction charging device for a vehicle charging system14 Jul 2026US 12,683,072 B2Mahle International GmbH
- Coil component17 Sep 2026US 2026/0279646 A1Sumida Corporation
- Magnetic assembly and manufacturing process27 Aug 2026US 2026/0253781 A1MetaPWR Electronics Co., Ltd.
- Integrated magnetic assembly for a multiphase dc-to-dc power converter13 Aug 2026US 2026/0237554 A1Delta Electronics (Thailand) Public Co., Ltd.
- Coil component and power supply device23 Jul 2026US 2026/0213065 A1TDK Corporation
- Reactor, converter, and power conversion device23 Jul 2026US 2026/0213066 A1Autonetworks Technologies, Ltd.
Most cited
By later US patents
- Split core sensing transformer254US 7,312,686 B2Veris Industries, LLC · 2007
- Ferrite core185US 6,501,362 B1UMEC USA, Inc. · 2002
- Power inductor and transformer with low acoustic noise air gap70US 4,047,138 AGeneral Electric Company · 1977
- Low profile magnetic structure in which one winding acts as support for second winding41US 4,583,068 AAT&T Bell Laboratories · 1986
- Laminated contactor core with blind hole35US 5,176,946 AAllen-Bradley Company, Inc. · 1993