H01F 29/10
Having movable part of magnetic circuit
Official title: having movable part of magnetic circuit {(high leakage transformers H01F38/08; dynamo-electric machines with movable part of magnetic circuit H02K23/44, H02K23/48)}
H01F29/10 (Having movable part of magnetic circuit) appears on 75 US grants and 47 published applications in this corpus.
Search patents in H01F- Granted patents
- 75
- Published applications
- 47
- Assignees
- 64
- Inventors
- 149
- Latest grant
- 10 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 1 |
| 2003 | 4 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 1 | 2 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 4 |
| 2015 | 0 | 0 |
| 2016 | 2 | 2 |
| 2017 | 1 | 6 |
| 2018 | 6 | 4 |
| 2019 | 2 | 3 |
| 2020 | 4 | 5 |
| 2021 | 4 | 2 |
| 2022 | 2 | 1 |
| 2023 | 2 | 3 |
| 2024 | 1 | 1 |
| 2025 | 2 | 3 |
By publication year. Applications have been published since 2001.
Recent patents
- Power inductor with variable width air gap10 Jun 2025US 12,327,669 B2Ford Global Technologies, LLC
- Inductive component and method for adjusting an inductance27 May 2025US 12,315,671 B2Philip Morris Products S. A.
- Systems and methods for fault detection in variable differential transformers16 Apr 2024US 11,959,977 B2Hamilton Sundstrand Corporation
- High frequency power supply system with closely regulated output for heating a workpiece10 Oct 2023US 11,784,576 B2Thermatool Corp.
- Power inductor with variable width air gap18 Apr 2023US 11,631,518 B2Ford Global Technologies, LLC
- Systems and methods for variable differential transformers secondaries with single rail bias8 May 2025US 2025/0149238 A1Woodward, Inc.
- System for parametric resonant varying inductance13 Mar 2025US 2025/0087400 A1Elan Research - 9456-4424 QuéBec Inc.
- Coupled inductor with adjustable leakage inductance23 Jan 2025US 2025/0029779 A1Itg Electronics, Inc.
- Resonant transformers with calibratable flux-shunt21 Nov 2024US 2024/0387096 A1Enphase Energy, Inc.
- Systems and methods for fault detection in variable differential transformers28 Dec 2023US 2023/0417845 A1Hamilton Sundstrand Corporation
Most cited
By later US patents
- Metal vapor electric discharge lamp system93US 4,160,193 A1979
- Multi-range, high-speed A.C. over-current protection means including a static switch47US 3,932,791 A1976
- Displacement - electricity transducer42US 4,013,911 AHitachi, Ltd. · 1977
- Use of variable impedance having rotating core to control coil sputter distribution41US 6,254,738 B1APPLIED Materials.Inc. · 2001
- Linear variable phase transformer with constant magnitude output33US 4,282,485 APneumo Corporation · 1981