G01R 15/183
Using transformers with a magnetic core
Official title: {using transformers with a magnetic core}
G01R15/183 (Using transformers with a magnetic core) appears on 634 US grants and 590 published applications in this corpus.
Search patents in G01R- Granted patents
- 634
- Published applications
- 590
- Assignees
- 379
- Inventors
- 1,281
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 11 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 6 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 11 | 0 |
| 1991 | 8 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 2 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 1 |
| 2002 | 13 | 9 |
| 2003 | 10 | 9 |
| 2004 | 11 | 13 |
| 2005 | 11 | 14 |
| 2006 | 16 | 20 |
| 2007 | 16 | 12 |
| 2008 | 8 | 18 |
| 2009 | 21 | 13 |
| 2010 | 10 | 16 |
| 2011 | 9 | 21 |
| 2012 | 12 | 24 |
| 2013 | 16 | 24 |
| 2014 | 20 | 26 |
| 2015 | 17 | 36 |
| 2016 | 31 | 30 |
| 2017 | 35 | 36 |
| 2018 | 35 | 27 |
| 2019 | 27 | 29 |
| 2020 | 26 | 38 |
| 2021 | 30 | 34 |
| 2022 | 32 | 26 |
| 2023 | 29 | 24 |
| 2024 | 24 | 40 |
| 2025 | 24 | 27 |
| 2026 | 23 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fluxgate current transducer with an analog measurement channel29 Sep 2026US 12,748,134 B2LEM International SA
- Current sensing device and direct-current (DC)/DC converter including the same8 Sep 2026US 12,730,133 B2Hl Mando Corporation
- Ring core current transducer for flux detection8 Sep 2026US 12,730,161 B2Danisense A/S
- Photovoltaic inverter and leakage current detection apparatus1 Sep 2026US 12,724,089 B2Huawei Digital Power Technologies Co., Ltd.
- Current transformer sensing with saturation protection25 Aug 2026US 12,719,260 B2Hamilton Sundstrand Corporation
- Flux gate-type residual current detection device and control method of same device24 Sep 2026US 2026/0287620 A1Ls Electric Co., Ltd.
- Device for measuring the main currents of an electrical installation, measuring method and protection method using such a device20 Aug 2026US 2026/0243804 A1Schneider Electric Industries SAS
- Measuring high currents through a transformer20 Aug 2026US 2026/0243805 A1Sagemcom Energy & Telecom SAS
- Intravascular lithotripsy devices and systems with current fault detection13 Aug 2026US 2026/0232335 A1Cardiovascular Systems, Inc.
- Current measurement device and method30 Jul 2026US 2026/0219301 A1Southern Power Grid Sensing Technology (Guangdong) Co., Ltd.
Most cited
By later US patents
- Power transmission line monitoring system469US 5,006,846 A1991
- Current sensor assembly283US 7,557,563 B2Power Measurement Ltd. · 2009
- Digital sensor apparatus and system for protection, control, and management of electricity distribution systems231US 5,995,911 APower Measurement Ltd. · 1999
- Digital sensor apparatus and system for protection, control and management of electricity distribution systems219US 6,236,949 B1Power Measurement Ltd. · 2001
- Power transmission line monitoring system199US 5,181,026 AGranville Group, Inc., The · 1993