G01R 21/003
Measuring reactive component
Official title: {Measuring reactive component}
G01R21/003 (Measuring reactive component) appears on 42 US grants and 42 published applications in this corpus.
Search patents in G01R- Granted patents
- 42
- Published applications
- 42
- Assignees
- 40
- Inventors
- 129
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 3 |
| 2014 | 1 | 1 |
| 2015 | 3 | 4 |
| 2016 | 1 | 6 |
| 2017 | 2 | 4 |
| 2018 | 4 | 3 |
| 2019 | 6 | 5 |
| 2020 | 3 | 5 |
| 2021 | 2 | 1 |
| 2022 | 2 | 3 |
| 2023 | 4 | 2 |
| 2024 | 2 | 0 |
| 2025 | 2 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Non-intrusive load monitoring method based on V—I trajectory and neural network23 Jun 2026US 12,663,450 B2Zhejiang University
- System and method for creation and operation of a microgrid from a preexisting electric grid14 Oct 2025US 12,444,974 B1Pondera LLC
- Method for measuring degree of stability of generator and power transmission line, and electrical grid control system20 May 2025US 12,306,225 B2Huaneng Clean Energy Research Institute
- Fault location system using voltage or current measurement from diverse locations on a distribution network19 Nov 2024US 12,146,904 B2S&C Electric Company
- Power measurement device23 Apr 2024US 11,965,917 B2Toshiba Mitsubishi-Electric Industrial Systems Corporation
- Method for detecting whether there is islanding and power conditioning system using same28 Aug 2025US 2025/0271475 A1Hanwha Solutions Corporation
- Real time live line measurement of current and voltage transformers5 Jun 2025US 2025/0180613 A1
- Fault location system using voltage or current measurement from diverse locations on a distribution network6 Mar 2025US 2025/0076364 A1S&C Electric Company
- Power measurement device2 Nov 2023US 2023/0349959 A1Toshiba Mitsubishi-Electric Industrial Systems Corporation
- Non-intrusive load monitoring method based on v-i trajectory and neural network21 Sep 2023US 2023/0296654 A1Zhejiang University
Most cited
By later US patents
- Method and apparatus for measuring volt-amps reactive power using synthesized voltage phase shift53US 5,243,536 AMetricom, Inc. · 1993
- Method and apparatus for measuring electrical parameters using a differentiating current sensor and a digital integrator45US 5,485,393 AMetricom, Inc. · 1996
- Arrangement for the measurement of reactive power or reactive energy42US 5,262,715 ALandis & Gyr Betriebs AG · 1993
- Fault isolation and service restoration in an electric grid39US 8,872,667 B2International Business Machines Corporation · 2014
- Fault isolation and service restoration in an electric grid20US 10,007,243 B2International Business Machines Corporation · 2018