H01F 38/40
For dc
Official title: for DC
H01F38/40 (For dc) appears on 10 US grants and 11 published applications in this corpus.
Search patents in H01F- Granted patents
- 10
- Published applications
- 11
- Assignees
- 9
- Inventors
- 35
- Latest grant
- 22 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 3 |
| 2018 | 2 | 0 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Non-rotating type direct current generator22 Apr 2025US 12,283,853 B2
- Direct-current circuit breaker3 Sep 2019US 10,403,449 B2Mitsubishi Electric Corporation
- Method for detecting ground faults in a LVDC electric line and an electronic device thereof16 Jul 2019US 10,352,985 B2ABB AB
- Sensor and method for electric current measurement5 Jun 2018US 9,989,562 B2
- Current transformer and method for converting a conductor current flowing in an electrical conductor to an output signal1 May 2018US 9,958,481 B2Weidmueller Interface GmbH & Co. KG
- Planar transformer22 Jan 2026US 2026/0024695 A1Hyundai Mobis Co., Ltd.
- Non-rotating type direct current generator31 Oct 2024US 2024/0364196 A1
- Magnetic component for galvanically isolated lcl-t resonant converter30 May 2024US 2024/0177925 A1Delta Electronics, Inc.
- Current Transformer with Optic Fiber Mode Electronic Circuit4 Aug 2022US 2022/0246350 A1Narayan Powertech Pvt. Ltd.
- Current transformer26 Aug 2021US 2021/0265110 A1Fluke Corporation
Most cited
By later US patents
- Dc-to-Dc power converter with integrated magnetic power transformer9US 5,920,473 AMagnetic Technology, Inc. · 1999
- Direct current transformer6US 4,135,127 A1979
- Transformer for d-c signals4US 4,023,100 A1977
- Method for detecting ground faults in a LVDC electric line and an electronic device thereof2US 10,352,985 B2ABB AB · 2019
- Direct-current circuit breaker1US 10,403,449 B2Mitsubishi Electric Corporation · 2019