G01R 19/20
Using transductors , i.e. a magnetic core transducer the saturation of which
Official title: using transductors {, i.e. a magnetic core transducer the saturation of which is cyclically reversed by an AC source on the secondary side}
G01R19/20 (Using transductors , i.e. a magnetic core transducer the saturation of which) appears on 80 US grants and 51 published applications in this corpus.
Search patents in G01R- Granted patents
- 80
- Published applications
- 51
- Assignees
- 68
- Inventors
- 165
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 10 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 1 |
| 2004 | 0 | 2 |
| 2005 | 2 | 3 |
| 2006 | 1 | 3 |
| 2007 | 5 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 1 | 3 |
| 2012 | 1 | 6 |
| 2013 | 0 | 3 |
| 2014 | 5 | 4 |
| 2015 | 6 | 8 |
| 2016 | 4 | 0 |
| 2017 | 5 | 0 |
| 2018 | 1 | 2 |
| 2019 | 2 | 1 |
| 2020 | 2 | 1 |
| 2021 | 0 | 2 |
| 2022 | 3 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 2 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fluxgate current transducer11 Nov 2025US 12,467,957 B2LEM International SA
- Fluxgate current transducer with an analog measurement channel21 Jan 2025US 12,203,964 B2LEM International SA
- Current sensor with flux gate12 Jul 2022US 11,385,264 B2Safran Electronics & Defense
- Differential current sensing bussing method12 Jul 2022US 11,385,300 B2Schneider Electric USA, Inc.
- Fast-response direct-current current transformer based on multi-sensor fusion31 May 2022US 11,346,866 B2Huazhong University of Science and Technology
- Fluxgate current sensor7 May 2026US 2026/0126476 A1Honeywell International Inc.
- Fluxgate current transducer with an analog measurement channel16 Jan 2025US 2025/0020696 A1LEM International SA
- Fluxgate current transducer with an analog measurement channel16 Jan 2025US 2025/0020697 A1LEM International SA
- Fluxgate current transducer with an analog measurement channel16 Jan 2025US 2025/0020698 A1LEM International SA
- Fluxgate transducer for current sensing8 Aug 2024US 2024/0264204 A1LEM International SA
Most cited
By later US patents
- Method and apparatus for sensing direct current of one polarity in a conductor and electronically commutated motor control responsive to sensed motor current77US 4,952,853 AGeneral Electric Company · 1990
- Measuring transformer42US 4,309,655 ALGZ Landis & Gyr Zug AG · 1982
- Detector circuit for current measurements39US 4,616,174 ADanfysik A/S · 1986
- Electricity meter with arrangement for monitoring core saturation incidents30US 4,843,310 ALGZ Landis & Gyr Zug AG · 1989
- High resolution current sensing apparatus30US 6,348,788 B1Rockwell Automation Technologies, Inc. · 2002