H01F 38/02
Adaptations of transformers or inductances for specific applications or functions: for non-linear
Official title: for non-linear operation
H01F38/02 (Adaptations of transformers or inductances for specific applications or functions: for non-linear) appears on 246 US grants and 212 published applications in this corpus.
Search patents in H01F- Granted patents
- 246
- Published applications
- 212
- Assignees
- 180
- Inventors
- 503
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 9 | 0 |
| 1978 | 3 | 0 |
| 1979 | 8 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 7 |
| 2003 | 7 | 3 |
| 2004 | 6 | 13 |
| 2005 | 4 | 8 |
| 2006 | 14 | 13 |
| 2007 | 8 | 7 |
| 2008 | 6 | 8 |
| 2009 | 4 | 9 |
| 2010 | 4 | 9 |
| 2011 | 11 | 8 |
| 2012 | 12 | 10 |
| 2013 | 7 | 16 |
| 2014 | 7 | 10 |
| 2015 | 6 | 20 |
| 2016 | 8 | 4 |
| 2017 | 15 | 9 |
| 2018 | 8 | 11 |
| 2019 | 4 | 6 |
| 2020 | 9 | 8 |
| 2021 | 8 | 9 |
| 2022 | 4 | 6 |
| 2023 | 5 | 5 |
| 2024 | 6 | 4 |
| 2025 | 5 | 6 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power supply module and transformer power supply device16 Jun 2026US 12,658,820 B2Delta Electronics (Shanghai) Co., Ltd.
- Single phase surface mount swing inductor component and methods of fabrication24 Mar 2026US 12,586,713 B2Eaton Intelligent Power Limited
- Nonlinear inductor, manufacturing method thereof, and nonlinear inductor row9 Dec 2025US 12,494,315 B2Shenzhen Sunlord Electronics Co., Ltd.
- Integrated inductor and power module21 Oct 2025US 12,451,278 B2Delta Electronics (Shanghai) Co., Ltd.
- High current, multi-phase, surface mount inductor and methods of fabrication2 Sep 2025US 12,406,799 B2Eaton Intelligent Power Limited
- Single phase surface mount swing inductor component and methods of fabrication21 May 2026US 2026/0142073 A1Eaton Intelligent Power Limited
- Dc electric grid5 Feb 2026US 2026/0039108 A1
- Protection device for a dc electric grid5 Feb 2026US 2026/0039109 A1ABB AB
- High current, multi-phase, surface mount inductor and methods of fabrication18 Sep 2025US 2025/0292954 A1Eaton Intelligent Power Limited
- Wireless excitation system3 Jul 2025US 2025/0218655 A1
Most cited
By later US patents
- Integrated-magnetic apparatus210US 5,726,615 A1998
- High average power magnetic modulator for metal vapor lasers121US 5,315,611 AThe United States of America as represented by the United States Department of Energy · 1994
- Three coil bridge transformer109US 5,225,971 AInternational Business Machines Corporation · 1993
- High frequency output inductor for inverter power supply103US 4,455,545 ASperry Corporation · 1984
- Low-noise switching power supply having variable reluctance transformer96US 4,994,952 AElectronics Research Group, Inc. · 1991