G01R 15/186
Using current transformers with a core consisting of two or more parts
Official title: {using current transformers with a core consisting of two or more parts, e.g. clamp-on type (G01R15/142 - G01R15/16 take precedence; tong testers G01R1/22)}
G01R15/186 (Using current transformers with a core consisting of two or more parts) appears on 203 US grants and 205 published applications in this corpus.
Search patents in G01R- Granted patents
- 203
- Published applications
- 205
- Assignees
- 130
- Inventors
- 420
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 3 |
| 2004 | 2 | 2 |
| 2005 | 2 | 4 |
| 2006 | 1 | 3 |
| 2007 | 2 | 2 |
| 2008 | 0 | 6 |
| 2009 | 4 | 1 |
| 2010 | 3 | 4 |
| 2011 | 1 | 4 |
| 2012 | 3 | 6 |
| 2013 | 4 | 14 |
| 2014 | 11 | 23 |
| 2015 | 20 | 11 |
| 2016 | 11 | 16 |
| 2017 | 15 | 11 |
| 2018 | 9 | 14 |
| 2019 | 11 | 11 |
| 2020 | 12 | 14 |
| 2021 | 16 | 16 |
| 2022 | 11 | 7 |
| 2023 | 17 | 12 |
| 2024 | 5 | 11 |
| 2025 | 8 | 3 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Coupler for coupling high-frequency EM energy with cables8 Sep 2026US 12,730,134 B2Connected Intelligence Systems Ltd.
- Method for checking the adequacy at the residual currents of differential circuit breakers18 Aug 2026US 12,712,355 B2Chauvin Arnoux
- Wireless electrical sensor and electrical parameter measurement and calculation apparatus, method and system14 Jul 2026US 12,681,061 B2Accupower Electronic Technologies Co., Ltd. of Taiyuan
- Electrical verification circuit for a current clamp, corresponding current clamp, and corresponding verification method23 Jun 2026US 12,663,494 B2Totalenergies Renewables
- Clamp for measuring AC and DC leakage currents6 Jan 2026US 12,517,154 B2Chauvin Arnoux
- Coupler for coupling high-frequency em energy with cables18 Jun 2026US 2026/0169036 A1Connected Intelligence Systems Ltd.
- Intelligent branch circuit metering system28 May 2026US 2026/0147019 A1Vertiv Corporation
- Clamp sensor and measuring device16 Apr 2026US 2026/0104438 A1Hioki E. E. Corporation
- Split-type measurement device26 Mar 2026US 2026/0086125 A1Rootech Inc.
- Electromagnetic energy charging clamp meter26 Mar 2026US 2026/0086126 A13Egreen Technology, Inc.
Most cited
By later US patents
- Current sensor assembly283US 7,557,563 B2Power Measurement Ltd. · 2009
- Power line takeoff clamp assembly222US 8,536,857 B2Tollgrade Communications, Inc. · 2013
- Portable self powered line mountable device for measuring and transmitting ambient temperature191US 9,380,857 B22016
- Power line sensors and systems incorporating same109US 7,174,261 B2Power Measurement Ltd. · 2007
- Revenue meter with integral current transformer102US 6,064,192 AOhio Semitronics · 2000