H01F 30/16
Toroidal transformers
H01F30/16 (Toroidal transformers) appears on 227 US grants and 190 published applications in this corpus.
Search patents in H01F- Granted patents
- 227
- Published applications
- 190
- Assignees
- 168
- Inventors
- 441
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 9 | 0 |
| 1988 | 4 | 0 |
| 1989 | 8 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 0 | 1 |
| 2002 | 3 | 8 |
| 2003 | 7 | 6 |
| 2004 | 4 | 10 |
| 2005 | 13 | 10 |
| 2006 | 7 | 10 |
| 2007 | 6 | 9 |
| 2008 | 5 | 10 |
| 2009 | 7 | 12 |
| 2010 | 11 | 10 |
| 2011 | 7 | 4 |
| 2012 | 6 | 1 |
| 2013 | 4 | 6 |
| 2014 | 2 | 5 |
| 2015 | 5 | 8 |
| 2016 | 5 | 8 |
| 2017 | 7 | 7 |
| 2018 | 9 | 10 |
| 2019 | 9 | 16 |
| 2020 | 6 | 10 |
| 2021 | 7 | 7 |
| 2022 | 10 | 4 |
| 2023 | 3 | 7 |
| 2024 | 4 | 6 |
| 2025 | 6 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Current transformer assemblies8 Sep 2026US 12,731,727 B2Schneider Electric USA, Inc.
- Driving circuit and control board9 Jun 2026US 12,652,044 B2Rohm Co., Ltd.
- Magnetic module and electrical connector including the magnetic module30 Dec 2025US 12,512,254 B2Foxconn Interconnect Technology Limited
- Flyback converter systems and methods11 Nov 2025US 12,470,122 B2OneSubsea IP UK Limited
- High voltage transformer, method for producing a high voltage transformer and test system and test signal device comprising a high voltage transformer10 Jun 2025US 12,327,676 B2Omicron Electronics GmbH
- Systems and methods for enhancing leakage inductance of power transformers26 Feb 2026US 2026/0058051 A1Archer Aviation Inc.
- Embedded induction magnetic component, transformer, and power supply device2 Oct 2025US 2025/0308743 A1Huawei Digital Power Technologies Co., Ltd.
- High-power telescope transformer25 Sep 2025US 2025/0299865 A1Semiconductor Components Industries, LLC
- Three-phase toroidal transformer28 Aug 2025US 2025/0273379 A1
- RF High Power Transformer Wound with Twisted Wire Bundle22 May 2025US 2025/0166887 A1Wjlp Company Inc.
Most cited
By later US patents
- Split core sensing transformer254US 7,312,686 B2Veris Industries, LLC · 2007
- 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
- Transformers and coupled inductors with optimum interleaving of windings144US 5,543,773 AElectrotech Instruments Limited · 1996