G01R 15/18
Using inductive devices
Official title: using inductive devices, e.g. transformers
G01R15/18 (Using inductive devices) appears on 1,611 US grants and 1,617 published applications in this corpus.
Search patents in G01R- Granted patents
- 1,611
- Published applications
- 1,617
- Assignees
- 816
- Inventors
- 3,212
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 6 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 5 | 0 |
| 1981 | 14 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 9 | 0 |
| 1985 | 10 | 0 |
| 1986 | 9 | 0 |
| 1987 | 8 | 0 |
| 1988 | 5 | 0 |
| 1989 | 10 | 0 |
| 1990 | 14 | 0 |
| 1991 | 11 | 0 |
| 1992 | 7 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 16 | 0 |
| 1996 | 20 | 0 |
| 1997 | 11 | 0 |
| 1998 | 18 | 0 |
| 1999 | 17 | 0 |
| 2000 | 16 | 0 |
| 2001 | 17 | 2 |
| 2002 | 22 | 17 |
| 2003 | 20 | 20 |
| 2004 | 19 | 20 |
| 2005 | 21 | 30 |
| 2006 | 23 | 35 |
| 2007 | 32 | 32 |
| 2008 | 15 | 34 |
| 2009 | 44 | 33 |
| 2010 | 23 | 39 |
| 2011 | 17 | 40 |
| 2012 | 33 | 52 |
| 2013 | 30 | 63 |
| 2014 | 50 | 84 |
| 2015 | 53 | 92 |
| 2016 | 73 | 87 |
| 2017 | 92 | 107 |
| 2018 | 91 | 96 |
| 2019 | 98 | 84 |
| 2020 | 96 | 100 |
| 2021 | 100 | 103 |
| 2022 | 80 | 87 |
| 2023 | 95 | 89 |
| 2024 | 89 | 110 |
| 2025 | 75 | 94 |
| 2026 | 66 | 67 |
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
- Method for testing a lightning protection system and/or a lightning detection system of a wind turbine22 Sep 2026US 12,742,440 B2Siemens Gamesa Renewable Energy A/S
- Planar current sensor for power conversion applications22 Sep 2026US 12,742,798 B2Virginia Tech Intellectual Properties, Inc.
- Electrical current measurement module8 Sep 2026US 12,730,131 B2Schneider Electric Industries SAS
- Substrate-embedded AC sensors8 Sep 2026US 12,730,132 B2Allegro MicroSystems, LLC
- Current monitor combining a shunt resistor with a rogowski coil1 Oct 2026US 2026/0298983 A1Tektronix, Inc.
- Non-contact electrical parameter measurement device with radial dual mounted sensors1 Oct 2026US 2026/0298984 A1Fluke Corporation
- Measurement system1 Oct 2026US 2026/0298986 A1Seikoh Giken Co., Ltd.
- System and method for cancelling magnetic field1 Oct 2026US 2026/0304723 A1Safefields Technologies Ltd
- Current monitor combining a shunt resistor with a rogowski coil24 Sep 2026US 2026/0287619 A1Tektronix, Inc.
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
- Power management method and system222US 7,132,950 B22006
- Power line takeoff clamp assembly222US 8,536,857 B2Tollgrade Communications, Inc. · 2013