H01F 27/2895
Windings disposed upon ring cores
Official title: {Windings disposed upon ring cores}
H01F27/2895 (Windings disposed upon ring cores) appears on 280 US grants and 432 published applications in this corpus.
Search patents in H01F- Granted patents
- 280
- Published applications
- 432
- Assignees
- 192
- Inventors
- 736
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 5 |
| 2004 | 0 | 5 |
| 2005 | 3 | 5 |
| 2006 | 3 | 3 |
| 2007 | 2 | 1 |
| 2008 | 2 | 4 |
| 2009 | 3 | 6 |
| 2010 | 4 | 6 |
| 2011 | 5 | 8 |
| 2012 | 5 | 6 |
| 2013 | 3 | 4 |
| 2014 | 6 | 6 |
| 2015 | 4 | 21 |
| 2016 | 6 | 35 |
| 2017 | 14 | 23 |
| 2018 | 24 | 34 |
| 2019 | 25 | 37 |
| 2020 | 20 | 26 |
| 2021 | 18 | 36 |
| 2022 | 29 | 34 |
| 2023 | 17 | 42 |
| 2024 | 30 | 37 |
| 2025 | 28 | 29 |
| 2026 | 16 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Liquid cooled inductor14 Jul 2026US 12,683,058 B2Ford Global Technologies, LLC
- Embedded magnetic component transformer device16 Jun 2026US 12,658,354 B2Murata Manufacturing Co., Ltd.
- Magnetic component for an electrical and/or electronic module2 Jun 2026US 12,646,646 B2Robert Bosch GmbH
- Direct Current Quantum Magnetic Transformer and Related Energy Saving Devices and Methods1 Oct 2026US 2026/0302048 A1Harmonify AB
- Switch and drive apparatus27 Aug 2026US 2026/0254450 A1Huawei Digital Power Technologies Co., Ltd.
- High-energy scalable, pulse-power, multimode multifilar-wound inductor6 Aug 2026US 2026/0229402 A1Richard H. Sherratt and Susan B. Sherratt Trust Fund
- Common mode filter circuit with cooler30 Jul 2026US 2026/0221329 A1IHI Corporation
- Inductor device2 Jul 2026US 2026/0188569 A1Huawei Technologies Co., Ltd.
Most cited
By later US patents
- Integrated circuit toroidal inductor182US 5,793,272 AInternational Business Machines Corporation · 1998
- Integrated circuit inductor175US 5,884,990 AInternational Business Machines Corporation · 1999
- Integrated circuit spiral inductor150US 6,114,937 AInternational Business Machines Corporation · 2000
- High voltage transformer76US 10,373,755 B2Eagle Harbor Technologies, Inc. · 2019
- Integrated electromagnetic interference filter60US 5,083,101 AIntegrated Power Components, Inc. · 1992